64 Zoological Society. 



lumellar groove ; and the convergence of the anterior extremities, 

 rendering the channel so much narrower than in piperita. 



13. Cypilea nivea. — 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 Cyprcea turdus : — vide Gray's Mo- 

 nograph (Zool. Jour, i. 511). The figures, however, of Cyprtea 

 nivea of Gray, in Sowerby's Conch. Illus. and in Reeve's Conch. 

 Iconica, are representations of the Cyprcea 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 Cyprtea nivea figured in 

 Wood's Supplement to the Index Testaceol. is a young Cyp. Hum- 

 phreysii of Gray. 



14. Cypr^ea Producta. — 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, pi. 24, fig. 137 ; and in Kiener's Species General, 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 the Habits of Cyclura lophoma, an Iguaniform Lizard. 

 By P. H. Gosse. 



The subject of the present paper seems to be as yet unknown to 

 science ; it may be thus described : — 



Cyclura lophoma, mihi — (\6tyos, a crest, and gjjjos, 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 alive in 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 



