64. Zoological Society. 
lumellar groove ; and the convergence of the anterior extremities, 
rendering the channel so much narrower than in piperita. 
13. Cypra#a nrvEA.—The shell described under that appellation 
by Gray, the original type of which, pierced with its two holes, is now 
before me, is a white variety of Cyprea turdus:—vide Gray’s Mo- 
negraph (Zool. Jour. i. 511). The figures, however, of Cyprea 
nivea of Gray, in Sowerby’s Conch. Illus. and in Reeve’s Conch. 
Iconica, are representations of the Cyprea oryza of Gray (Zool. Jour. 
iii. 369); this same error seems to pervade in the arrangement of 
most of the collections I have seen. The Cyprea nivea figured in 
Wood’s Supplement to the Index Testaceol. is a young Cyp. Hum- 
phreysit of Gray. 
14. Cypra#a Propucta.—I am able at length to refer concho- 
logists to other specimens of this species than that described by 
me December 22, 1836, in these ‘ Proceedings,’ which have been 
brought to this country by Capt. Sir Edward Belcher, and collected 
during the voyage of H.M.S. the Samarang. They are distributed 
into the cabinets of Miss Saul, Messrs. Cuming, Gaskoin, &c. The 
original shell, the type of this species, is well-represented in Sow- 
erby’s Conchological Illustrations, fig. 155 ; in Reeve’s Conchologia 
Iconica, pl. 24, fig. 187 ; and in Kiener’s Spécies Général, et Icono- 
graphie des Coquilles vivantes, fol. 53, figs. 5 and 5 :—this last is 
copied from Sowerby. 
June 27.—William Yarrell, Esq., V.P., in the Chair. 
1. On roe Hasits or CycturRA LOPHOMA, AN IGUANIFORM LIZARD. 
By P. H. Goss. 
The subject of the present paper seems to be as yet unknown to 
science ; it may be thus described :— 
CycLurA LopHOMA, mihi—(Aogos, a crest, and wpos, the shoulder). 
Shields on the muzzle separated by small scales; muzzle with four 
many-sided, convex, unkeeled plates on each side, the anterior and 
posterior very large, the intervening two smaller, short, but wide. 
General head-shields irregular in size, a largish one near the middle 
of the head; lower jaw with one (posteriorly two) series of large, 
rhomboidal, keeled plates, with none between them and the labial 
plates. Dorsal crest high, continuous over the shoulders, inter- 
rupted over the loins. 
Length about 3 feet, of which the tail measures 21 inches. Colour 
(in a dried state) greenish-grey, with obscure blackish spots, con- 
fluent, so as to form a rude reticulation. 
This very distinct species may be at once recognised by the num- 
ber, form and arrangement of the plates of the muzzle, and particu- 
larly by the serrated crest not being interrupted over the shoulders. 
I have never met with it alivein Jamaica; the specimen from which 
the above description is taken, now in the British Museum, was one 
of many zoological treasures presented to me by my kind and valued 
friend, Richard Hill, Esq., of Spanish-town. It is to the same gen- 
tleman that I am indebted for the whole information, concerning the 
