UTRICULUS. 



rounded in front ; aperture posteriorly narrowed ; 



columella rather straight. 

 MiGHELS. Boston Journal of Natural History, vol. ii. 



p. 346. 

 Hah. Casco Bay, United States. 



A very minute glassy shell, of a cylindrical form_ 

 truncated at the spire. 



Species 5. (Mus. Cuming in Brit.) 



I'triculus obtusa. Utr. minutd, cylindraced, latius- 

 cidd, postice subattenuatd, longitudina liter rugoso- 

 striatd, opacd, albd, spird elevatiusculd, aperturd 

 angustd, medio coarctatd, antice dilatatd ; colu- 

 melld subincrassaid, arcuatd. 



The obtuse Utriculus. Shell minute, cylindrical, 

 rather broad, posteriorly subattenuated, longitu- 

 dinally rugosely striated, opaque white ; spire a 

 little elevated, aperture narrow, contracted in the 

 middle, dilated anteriorly ; columella a little 

 thickened, arched 



TuRTON. Walker's Testacese Minuta;, f. 61. 

 Ilah. British Islands. 



Species 6. (Mus. Cuming.) 



Utriculus borneensis. Utr. testd ])arvd, redd, cylin- 

 dricd, albd, pellucidd, epidermide ferrugined, testd 

 longitudinaliter striatd ; spird distinctd, com- 

 planatd, anfractibus quatuor, apice mammiUato ; 

 aperturd angustissimd, antice dilatatd, columelld 

 arcuatd. 



The boenean Utriculus. Shell small, straight, cylin- 

 drical, white, pellucid, epidermis ferruginous, shell 

 longitudinally striated ; spire distinct, flattened, 

 with four whorls, apex mammillated, aperture very 

 narrow, dilated in front, columella arched. 



A. Adams. Sowerby's Thesaurus Conchyliorum. 

 Bullids, f. 23. 



Sab. Borneo. 



This shell is smaller than Utriculus Cecilim, trun- 

 cated at the spire, and the straightest of the group. 



