ft Dr. P. P. Carpenter on new Forms of Mollusks 



carinato, anfractus intus raonstrante. Long. '28, long. spir. '08, 

 lat. -3 poll., div. 110°. 



25. Fussarus parcipidus. 



F. testa parva, solidiore, spira plus minusve elevata; albida, rufo- 

 fusco varie maculata ; carinulis spiralibus acutioribus, quarum 

 circ. vi. majores, striolisque crebris cincta ; anfr. ultimo tutnidiore ; 

 labro acuto, baud intus iucrassato ; umbiiico satis magno, ad mar- 

 gineni carinato : operculo normali. Long. "24, long. spir. *06, 

 iat. -2 poll., div. 90°. 



The few specimens found tire very variable in outline. 



26. Fossarus purus. 



F. testa F. angvlato simili, sed alba, subdiaphana ; anfr. nucl. ii., 

 fuscis, ut in F. tuberoso cancellatis ; norm. ii. et diinidio, altis, 

 valde tumentibus, carinatis ; carinis iv., validissiniis, acuti^simis, 

 quarum ii. in spira monstrantur ; carinulis aliis antice et postice 

 plus minusve expressis ; tota superficie minute spiraliter striata ; 

 carinularum basalium interstitiis subobsolete decussatis; apertura 

 late semilunata ; labro a carinis valde indentato j labio recto, an- 

 gusto ; umbiiico magno, carinato ; operculo fusco, valde pauci- 

 spirali, minutissime rusruloso, nucleo antico. Long. '08, long, 

 spir. -03, lat. -08 poll., div. 90°. 



27. Litorina pullata. 



X. testa parva, solidiore, luctuosa ; spira satis exserta ; nigrescente, 

 seu livido-t'usco tincta, lineis spiralibus exilissimis pallidioribus or- 

 nata ; interdum obscure tessellata ; anfr. v., subplanatis, suturis 

 parum impressis; sublaevi, striolis spiralibus teuuiter insculpta; co- 

 lumella intus incrassata ; pariete baud excavato. Long. '4, long, 

 spir. -18, lat. -29 poll., div. 60°. 



= Litorina, sp. ind.^ Maz. Cat. no. 399, p. 350. 



28. Litorina [Philippii, var.) penicillata. 



Jj. Ph. testa parva, lineis radiantibus, variantibus, delicatuHs, rarius 

 ziczacfonnibus, et cingulis duobus spiralibus, quorum unum in 

 spira monstratur, elegantissime penicillata. Long. '33, long, 

 spir. -14, lat. 2 poll., div. 50°. 



Closely resembling the West-Indian L. ziczac, var. lineata, 

 D'Orb. Intermediate specimens, however, clearly connect it 

 with the common Mazatlan form. 



29. Rissoa albolirata. 



It. testa parva, alba, crystallina, normali ; marginibus spirse undatis; 

 anfr. nucl. iii., Isevibus, mamillatis ; norm, iv., medio subconvexis, 

 postice supra suturas planatis ; basi subplanata, effusa, hand um- 

 bilicata ; lirulis spiralibus crebris, obtusis, quarum circ. x. in spira 

 monstrautur ; apertura subovata, peritremate contiuuo ; labro 



216 



