BUBO! L 



whorl inflated. apex i.l.iiiH-; aperture nearly round, with -i 

 sliirhtly thickened lip. 



The spin- outline more COHV6X than in tin* precrdinir Aperies. 

 A', /n'lifi't. Tibori, Ms. has l>een <|iioted a.- a -ynonym. 



IJ. TlBEBIANA, I~rl. IM. 71, fiir. !'<). 



Kimate. pellucid, whitish or yellowish, shining, litly 



longitudinally sti-iulale; whorls 4', convex, Mitnre iniprevM^I, .,].- 

 scurely iiKir^incd ; peristoine a little thickened, continuous. 



Length, 1'") mill. 



R. GLOBULUS, Moller. PI. 7<), fi.ir. <4. 



\Vhorls rapidly enlarLi-inu', convex, with deej) suture, apex ol.t 

 hyaline, whitisli or vellowi>h, shining, smooth. Length. L' 1 .") mill. 



Norway, Xj>itzbergen, Greenland, Gulf of St. Lawrence. 



\\. <;i.i>i;ri.iN'.\, ^Fonts. (uiifigured.) N/r/7//. 



Unfigured Species of Scfin. 

 H. I'ATKXS, Gould. Charleston lln 



R. TRICINCTA, R. CANDIDA, R. BIFAs( I A I A, A. Ad. J'/jxiii- 



R. FLAMIA, r>eddoine. 



R. BI/nNATA. Nevill. Mr 



\\. SIKNN.I:. Tenison Woods. 



\\. TOI:< TL AIMS, TtMiison Woods. Port Jack--'n. 



R. GIMK;I. Friele. (Figure inaccessible to i *eas. 



Siiho-ciius RlSSOPsis, (iarrett. ! 



K. TYI-ICA, Gtarrett PI. ;, li-. .">_>. 



Thin, hvaline, smooth, ^lossv. white ; whorl- li. tlat, -utnre faintly 

 impres>ed, niarii-iiuMl ; pei'i>tome rather thin, sinuous. sonie\vh;i' 

 panded. columella ol)li(|in-ly arched, .-li-htly calloii-. 



Length. 10 mill. 



I'/// a ml S<i,no<i Is. 



Sul)L r -nus A i. VAM \. Hi-... l^'JU. 



K. CTMEX, Linn. IM. ,r>. fi-.. H. H'. 



Impert'oi-ate, .-tron-j;, opa<|Ue, covered l>y round- d irranulrs in 

 lon.L'itinlinal and spiral 961168, white OF liirht t'ulvou- in 



