collected at Cape St, Lucas, 7 



lata; peritremate pene contiuuo, acuto. Long. *!, long. spir. 'OJ, 

 lat. -07 poll., div. 70°. 

 Variat inteidum rugulis incrementi ornata. 



20. Eucosmia (i variegata, var.) suhstriata. 



E. testa E. variegatce siniillima, sed anfr. circa basin et supra spiram 

 (nisi in anfr. nucl. Isevibus), interduin tola superficie tenuiter et 

 crebre striatis ; striis anfr. penult, circ. x. 



31. Eucosmia punctata, 



IE. testa E. variegatce simili, sed multo majore, multo magis elon- 

 gata, angustiore, Phasiauelloidea ; plerumque fusco creberrime 

 punctata; umbilico parvo. Long. •22, long. spir. "1 1, lat. "lo poll., 

 div. 50°. 



22. Eucosmia CTjclustoma, 



E. testa parva, valde obtusa, lata, regulari, valvatoidea ; marginibus 

 spirse vix excurvatis ; pallida cinerea, fusco-olivaceo dense punc- 

 tata seu maculata ; anfr. nucleosis pallidis, mamillatis ; normali- 

 bus iii., valde tumentibus, suturis valde inipressis; apertura vix a 

 pariete indentata ; umbilico magno, subspirali. Long. "05, long, 

 spir. -02.5, lat. -05 poll., div. 90^ 



Curiously like a small depressed Valvata obtusa, but with the 

 texture of P/iasianella. 



Genus Haplocochlias*. 



Testa CoUoniam simulans, sed baud raargaritacea : apertura circu- 

 laris, varicosa : columella baud callosa. 



The animal and operculum are unknown. Its affinities may 

 be with Ethalia. 



23. Haplocochlias cyclophoreus. 



H. testa compacta, parva, solidiore ; albida, seu pallida aurantiaca ; 

 anfr. v., rapide augentibus, suturis impressis ; tota superficie mi- 

 nutissime spiraliter striolata, nitida ; apertura rotundata ; peri- 

 tremate continue, incrassato, extus varicoso ; labio distincto ; axi 

 t. jun. umbilicata, adultai lacunata. Long. '19, long. spir. "06, 

 lat. -2 poll., div. 100°. 



When laid on its base, this shell resembles Helicinn ; but the 

 mouth is more like Cyclophorus. The young shell is semi- 

 transparent, and resembles a Vitrinella with thickened lip. 



34. Narica aperta. 



N. testa parva, inflata, tenui, alba ; anfr. nucl. ?....; norm, rapide 

 augentibus, lirulis crebris spiralibus, in spira hie et illic niajori- 

 bus, a striolis creberrimis radiantibus minutissime decussatis •, 

 feuiuris valde impressis ; apertura subcirculari ; umbilico maximo, 



* Th. aifKovs, unadorned j Ko^Xlas, suail. 



215 



