_'l 1 rsA. 



i \ i A Jeffreys. Unfig tired. 



Shell represented by a single specimen, which was unfortunately 

 broken in -ilting the dredged material. It resembles Bulla hyemali* 

 Owthouy (= .1m;/ // /.</;// yrn globosa Love*n, -- I'tricn/opsis vitrea M. 

 Sars) except in being smaller, shorter, and equally broad through- 

 out, in-tead .i' barrel-shaped; the crown is consequently longer in 

 proportion and not so much raised at the point; but the especial 

 difference consists in this being beautifully sculptured, and not 

 smooth like the other species ; besides a few coarse spiral ridges the 

 \\hole surface is closely and microscopically striated in the same 

 direction. Length OJ, breadth 0'075 in. (Jeffr.}. 



North Atlantic, 1750 fms. 



Utriculus substriatus JEFFR., Ann Mag. N. H. (4), xix, p. 334. 



UTRICULUS OBESUS Jeffreys, Rep. Brit. Ass. Adv. Sci. 1880, p. 387. 

 Bay of Biscay (name only). 



UTRICULUS PUSILLUS Jeffreys, /. c. Same locality (name only). 

 UTRICULUS K\< \\ AITS Jeffreys, I. c. Same locality (name only). 



R. OBTUSA Monta-M. PI. 23, fig. 51. 



Shell forming an oblong cylinder, constricted in the middle, and 

 becoming broader towards the base ; it is usually opaque, and rather 

 glossy: M'tilpturc, numerous slight lines of growth ; and in young 

 and fresh shells may be scrutinies detected under the microscope 

 extremely close-set and fine wavy spiral lines; spire indistinctly 

 ted across; epidermis skin-like, cream-colour passing into 

 hr<>\vni>h-yellow; colour white; spire short, but very variable in 

 that iv-ij.rct. brin;: in some cases almost truncated, while in others 

 it i- more, or less extended ; whorls 1, .-lightly angulated at the top; 

 those in the middle gradually enlarge; the apical or central whorl 

 is globular and turned inwards; suture deep and narrowly excav- 

 ated; mouth flexuous, upper half narrow: lower half wide, with a 

 founded base; out, j- lip gently curved, never extending to the apt \ : 

 it recedes above, so as to leave a space between the outermost whorl 

 and tin- next, and is contracted and inflected in the middle; outer 

 corner rounded ; inner corner obliquely incurved : inner lip thicker 

 than in the last species, continuous with the outer lip above; it is 

 reflected over the pillar, behind which it occasionally forma a small 



