98 Rev. A. M. Norman on the Ge.iera and 



temporal shield, which 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. PL 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 intermedins. 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 + 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. 

 Giinth. Proc. Zool. Soc. June 28, 1864. 

 Scales in twenty-three rows ; ventrals 258 ; subcaudals 120. 

 Temporals 2 + 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 Echinodermata. 

 By the Rev. Alfred Merle Norman, M.A. 



Part I. 



CRINOIDEA OPHIUROIDEA — ASTEROIDEA. 



Twenty-four 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 the 



