collected at Cape St. Lucas. 7 



tata; peritremate pene continue, acuto. Long. *1, long. spir. '05, 

 lat. -07 poll., div. 70. 

 Variat interdum rugulis increment! ornata. 



20. Eucosmia (tvariegata, var.) substriata. 



E. testa E. variegatae simillima, sed anfr. circa basin et supra spiram 

 (nisi in anfr. nucl. Isevibus), interdum tota superficie tenuiter et 

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



21. Eucosmia punctata. 



E. testa E. vamegata simili, sed multo majore, multo magis elon- 

 gata, angustiore, Phasianelloidea ; plerumque fusco creberrime 

 punctata ; umbilico parvo. Long. *22, long. spir. 1 1, lat. 1 5 poll., 

 div. 50. 



22. Eucosmia cyclostoma. 



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

 spirae vix excurvatis ; pallide cinerea, fusco-olivaceo dense punc- 

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

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

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

 spir. -025, lat. '05 poll., div. 90. 



Curiously like a small depressed Valvata obtusa, but with the 

 texture of Phasianella. 



Genus HAPLOCOCHLIAS*. 



Testa Colloniam simulans, sed baud margaritacea : 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 pallide 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, adultse lacunata. Long. '19, long. spir. '06, 

 lat. -2 poll., div. 100. 



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

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

 transparent, and resembles a Vitrinella with thickened lip. 



24. Narica aperta. 



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



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

 bus, a striolis creberrimis radiantibus minutissime decussatis ; 

 Suturis valde impressis ; apertura subcirculari ; umbilico maximo, 



* TA. dTrXovs, unadorned j Ko^X/a?, snail. 

 215 



