4m"S. %X%\i^v Zoological SocietyhiiiS /3 291 



would be very happy to give you any information on the subject. 

 He told me that he found the above-mentioned skull among some 

 rubbish, and that it was a long time before they made out what 

 it was." 



__ _^___ 



PROCEEDINGS OF LEARNED SOCIETIES. 



ZOOLOGICAL SOCIETY, ^^■jun v- ib.:;.'- 



November 13, 1849.— William Yarrell, Es({i Wilie^WBit/'' 

 ^^>V\hv iri arrlT 



»xio ^,> ..J)escription of a new species of Cythei^^^o t(IlBH) 

 nimq k* By Lovell Reeve, F.L.S., F.Z.S. ETCj.^jyfgq sdilo 



Cytherea nobilis. Cijth. testa orhiculari-cordatdy crassd, trans- 



versim concentric^ liratdy liris rudibuSy obtusis, subplanulatis, 



numerosis, crebris, valde irregularibus, hie illic intermissis, nan 



parallelis ; lacted, epidermide tenui corned, trans^uciddy indutd. 



Long. 4i in. ; lat. 2^ in. ; alt. 4 in. ifil 37/? 80^/?fq-m*ffi iaifr 



Hab. ? '' ' ..'. - i- 



This fine species, from the collection of A. L. Gubba, Esq., is di- 

 stinguished by a peculiarity in the form and arrangement of the con- 

 centric ribs with which it is sculptured. They are very numerous, 

 flattened, close-set, and extremely irregular, now narrow, now broad, 

 each one varying irregularly in width and now and then suddenly in- 

 termitted. It is of a pure cream-colour, covered with a thin, horny, 

 transparent epidermis. Mr. Gubba obtained it from a vessel in 

 Havre-de-grace, but coidd not ascertain its locality. ''^'JiJ'' ■</' 



i\ 



Descriptions of twenty-four new species of Helicea, 



FROM THE Collection of H. Cuming, Esq. 



By Dr. L. Pfeiffer. 



1. Streptaxis glabra, Pfr. Str. testd umbilicatdy depress^ 

 ovatdy tenui, pellucidd, virescenti-albidd, omnino glabrd ; spird 

 laterali, acutiusculd ; suturd albo-marginatd ; anfractibus 6 

 convexiusculis, penultimo injlato, ultimo antrorsum deviante ; 

 umbilico angusto, non pervio ; aperturd perobliqud, semicircu- 

 lariy dente minuto parietis aperturalis munitd ; peristomate 

 alboy subincrassatOy breviter rejletdb, -^^-^^ cliiuiia Ji 



Diam. maj. 8, min. 6, alt. 5 mill. '''i«>'>s ^d :)bma fid xmn . 

 Hab. Demerara. "i '^Il^baqaa .femusgjji.u 



>'•! iff 



2. Streptaxis Cumingiana, Pfr. Str. testd perforatd, de- 

 presso-globosd, soliduld, glabrd, virenti-albidd ; spird sublate- 

 rail, conoided; anfractibus 7 angustissimis, subplanis, penul- 

 timo prominulo, ultimo antrorsum deviante ; aperturd jicrobli- 

 qudy auriformi, lamelld intrante parietis aperturalis coarctatd; 

 peristomate simplice, breviter expanso, marginibus callo tenui 

 junctis, dextro arcuato, in/erne dente 1 acuto munito, basali 



