Published in Bulletin of The Museum of Comparative Zoology, Harvard, in 1881, in volume 9, pages 1-31

Published in Bulletin of The Museum of Comparative Zoology, in 1881, in volume 8, pages 239-256

Published in Bulletin of The Museum of Comparative Zoology, in 1881, in volume 8, pages 127-140

Published in Bulletin Mus. C Z., in 1881, in volume 8, issue 8, pages 141-182