286 DIAPHANA. 



Utriculopsu densistridta Leche, Kongl. Sv. Vet. Akad. Handl., 

 xvi, p. 74, pi. 1, f. 20, a, h, c (shell), f. 20 d (dentition), 1878.— 

 Diaphana densisiriata Aurivillius, Vega Exped. Vetenskap. 

 lakttagelser, iv, p. 371. 



D. GLOBOSA Loven. PI. 26, fig. 75. 



Shell very thin, vitreous, subglobose ; base obliquely rounded ; 

 vertex narrowly truncated, narrowly perforated, the spire nearly 

 concealed. Aperture as long as the shell, narrow and supine above, 

 expanded below ; outer lip produced above the vertex and subangu- 

 late, obliquely arcuate below; columella flexuous; umbilicus dis- 

 tinct. Alt. 4 mill. {Sars). Scandinavia. 



Aviphisphyra globosa Loven, Ind. Moll. Scand,, p. 11 (Ofv. 

 Kongl. Vet. Akad., 1846, p. 143). — Diaphana globosa Sars, Moll. 

 Reg. A ret. Norv., p. 290, pi. 18, f. 4 (shell), f. 3 c (animal) ; pi. xi, 

 f. 12 (dentition). — Utriculus (jlobosu.s Sovvb., Conch. Icon., xviii, f. 

 2. — Utricuhpsis vitrea M. Sars, Bidrag til Kundskab Christiania- 

 fjordens Fauna, ii, p. 65, pi. 11, f. 16-18 (shell only ; not f. 15, ani- 

 mal, which is Philine vitrea, q. v). 



D. hiemalis Couthouy. PI. 59, fig. 28. 



Shell minute, globose, thin and fragile, subtranslucent, horn col- 

 ored ; body whorl very convex, widest in the middle, narrowly 

 truncated at the vertex, which shows a minute umbilical perfora- 

 tion. Aperture narrow above, rising well above the vertex, broad 

 below; outer lip strongly sinuous, receding toward the upper inser- 

 tion, rising high above the vertex of the body of the shell ; colum- 

 ella long, thin, slightly sinuous, partially closing the narrow umbil- 

 icus. Alt. 2], diam. 2 mill. 



Maine to Massachusetts Bay ; Scandinavia. 



Bulla hiemalis Couth., Bost. Journ. Nat. Hist., ii, p. 180, pi. 4, 

 f. 5.— DeKay, N. Y., Moll., p. 18, pi. 35, f. 335.— Gld., Inv.Mass., 

 p. 163, f. 100. — Diaphana hiemalis Stimpson, Check-Lists, p. 4. — 

 W. G. Binn. in Olds. Inv. Mass., p. 216, f. 506.— Sars, Moll. Reg. 

 Arct. Norv., p. 291, pi. 18, f. 3. 



More globose than any of the preceding species. The figure is 

 drawn from a Massachusetts specimen. 



D. nivea Petterd. Unfigured. 



Shell globose, very thin, semitransparent, milky-white, shining ; 

 whorls 4, spire small, scarcely projecting; longitudinally striated 



