Published in Proc. Biol. Soc. Wash., in 1919, in volume 32, pages 145-148

Published in Proc. Biol. Soc. Wash., in 1919, in volume 32, pages 213-216

Published in Proceedings of the Biological Society of Washington, in 1919, in volume 32, pages 211-212

Published in Proceedings of the Biological Society of Washington, in 1919, in volume 32, pages 197

Published in Proc. Biol. Soc. Washington, in 1919, in volume 32, pages 121-124

Published in Proceedings of the Biological Society of Washington, in 1919, in volume 32, pages 75-92

Published in Proceedings of the Biological Society of Washington, in 1919, in volume 32, pages 245-246

Published in Proc. Biol. Soc. Washington, in 1919, in volume 32, pages 207-210

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 185-186

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 15-19

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 177-183

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 247-248

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 187-188

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 189-193

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 119-120

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 225-234

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 253-267

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 269-270

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 149-159

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 217-223

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 249-251

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 11-13

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 49-73

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 25-27

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 203-205

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 243-244

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 271-279

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 161-162

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 105-110

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 163-164

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 9-10

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 23-24

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 196-197

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 1-4

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 133-134

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 111-112

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 125-126

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 129-132

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 29-32

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 135-137

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 239-240

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 41-44

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 5-6

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 93-96

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 33-40

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 241-242

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 169-171

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 113-117

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 165-168

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 199

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 45

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 46