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



gata, angustiore, Phasianelloidea ; pleruraque fusco creberrirae 

 punctata ; umbilico parvo. Long. -22, long. spir. -11, lat. • 1 5 poll., 

 div. 50°. 



32. Eucosmia cyclostoma, 



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

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

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

 bus iii., valde tumentibus, suturis valde irapressis ; 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 continuo, 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 bic et illic majori- 

 bus, a striolis creberrimis radiantibus minutissime decussatis ; 

 suturis valde impressis ; apertura subcirculari ; umbilico maximo, 

 carinato, anfractus intus monstrante. Long. '28, long. spir. -08, 

 lat. -Spoil., div. 110°. 



25. Fossarus parcipicttts. 



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 tumidiore ; 

 labro acuto, baud intus incrassato ; umbilico satis magno, ad mar- 

 ginem carinato : operculo normali. Long. '24, long. spir. '06, 

 lat. -2 poll., div. 90°. 



The few specimens found are very variable in outline. 

 * Th. dTrXoxJs, unadorned ; KoxXtar, snail. 



