180 Dr. P. P. Carpenter on new Forms of Mollusca 



tumentibus ; omnino minutissime fusco punctata ; columella lacu- 

 nata. Long. '24, long. spir. -12, lat. '14, div. 50°. 



Hab. S. Diego (Jewett). 



265 b. Phasianella (? compta, var.) pulloides. 



P. testa P. pullo simillima ; solida, compacta, spira breviore ; suturis 

 distinctis. Long. '2, long. spir. '1, lat. *13, div. 55°. 



Hab. Sta. Barbara {Jewett) ; Monterey, 20 fathoms (State 

 Coll. no. 353). Smaller var., 8-10 fathoms, Catalina Island 

 (Cooper). 



265 c. Phasianella (? compta, var.) elatior. 



P. testa perparva ; spira elongata, ut in P. pullo picta ; anfractibus 



subplanatis ; suturis haud impressis ; columella haud lacunata. 



Long. -19, long. spir. -12, lat. -11, div. 40°. 



Hab. Sta. Barbara (Jewett). 



P. compta, with a large proportion of the small shells of the 

 genus, is included under P. pullus in Mr. Reeve's monograph. 

 In so difficult a tribe, it is judged better to name the distinct 

 forms, and those from separated localities, until more is known. 



276. Trochiscus convexus. 



T. testa parva, subelevata, purpureo-fusca, tenuiter sculpta; anfr. nucl. 

 ? sinistralibus, vertice quasi decollato ; norm, iv., convexis, suturis 

 impressis ; obtusissime bicarinatis, striolis confertissimis, minimis, 

 subobsoletis cinctis ; umbilico majore, costis duabus cincto, quarum 

 interior acuta, exterior rotundata, crenata ; apertura circulari. 

 Long. "15, long. spir. - 06, lat. "15, div. 90°. 



Hab. Monterey (Jewett). 



The nuclear whorls in this unique little shell and in the typi- 

 cal species appear sinistral, as in Phoridse and Solariadse. The 

 operculum also resembles that of Solarium rather than of Tro- 

 chus. The genus may prove to belong to the Proboscidifers, 

 notwithstanding its nacreous texture. 



317. Hipponyx tumens. 



H. testa normaliter fornicata, rotundata, albida ; epidermide rugulosa, 

 interstitiis pilulosa ; vertice nucleoso nautiloideo, laevi, parum tu- 

 mente, apice celato, interdum persistente ; dein rapidissime au- 

 gente, expansa, undique regulariter arcuata ; liris acutis, subele- 

 vatis, distantibus, spiralibus, aliis intercalantibus ; lineis incre- 

 menti minoribus decussantibus ; margine acuto ; apertura ple- 

 rumque rotundata : cicatrice musculari a margine parum remota, 

 regione capitis valde interrupta. Long. ■ 7, lat. "46, alt. '33, div. 90°. 



Hab. Sta. Barbara (Jewett); S. Pedro (Cooper). 



= "H. ?subrufa" + " Capulus, 213/' Brit. Assoc. Rep. 1857, 

 p. 230. 



