98 Rev. A. M. Norman on the Ge/iera and temporal shield, whicli is in contact with the second upper post-orbital. , Three large shield-like scales behind the occipitals. Dull brownish green ; each scale on the front part of the trunk with a black tip. Scales and shields of the tail with a narrow black margin. Total length 64 inches; tail 15 inches. One specimen has been obtained by Dr. Welwitsch in Golungo Alto, a district in Angola. Dendraspis angusticeps, Smith. PI. III. fig. B. Scales in seventeen or nineteen rows; ventrals 226-270* Two very large anterior temporals, the upper of which extends as far backwards as the occipital. Southern and Western Africa, Dendraspis intermedius. PI. III. fig. C. Scales in nineteen rows; ventrals 206; subcaudals 112. Upper labials eight, the sixth being the largest, the seventh and eighth small ; temporals 2 4-3 ; both anterior temporals in con-tact with the postoculars, and not extending as far backwards as the occipitals. Uniform green, with a few scattered yellowish spots. Inside of the mouth white. One specimen, 55 inches long, tail 13 inches, was received from the Zambesi River. Dendraspis polylepis. PI. III. fig. D. Gunth. Proc. Zool. Soc. June 28, 1864. Scales in twenty-three rows ; ventrals 258 ; subcaudals 120. Temporals 2 -h 3; both anterior temporals in contact with the postoculars. Dull greenish olive; hind part of the body and tail with small irregular blackish spots; inside of the mouth black. Zambesi. XIII. — On the Genera and Species of British Echinodei'mata. By the Rev. Alfred Merle Norman, M.A, Part I. CrINOIDEA OpHIUROIDEA — ASTEROIDEA. TwENTY-rouR years is a long period in the history of our know-^ ledge of any class in the animal kingdom ; and such is the time which has elapsed since our latest and, indeed, only monograph on British Starfishes was published ; and Prof, Forbes's work still remains our only authority on the subject. In the interim^ however, not only has very much been learnt respecting thq
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