'IN \. 



,n mi i, IMiil. 

 II. I. I VK, \ i \. II. MI . i;..\ \ i \. II. ii i;i i: i i.\ i \, ||. i i 



Menke, I,'. -. ROBICULATA, M.ill. Qreciil<n,<l. 



II. .i: LDATULA, I!. I:M \< i \ i \. Mordi. II 



R. CRAflSIOOflTA, I!. EULIMOIDEB, II. \ r.i i: i: \ \-. A. Ad. ./</// 



II. [NOOMPTA, < i'Hlld. l'ln,-n\. 



II. GEHTIXJBB] LNA, Bowb. IM. r,s. ii; 



= llijilrnbiii f,'nfif.^'HKi, < Vosse. 

 II. in < i M. ri. ATA, and R. TENUicoerATA, Beguenza. .!/ 



II. Hosrn, Payr. <ica. 



II. IM Ncrr.M, (anti-nine. MecKterr 



II. \V i:vvi 1. 1. i:- r riK)Mi'soNi, Jeffreys. An- 



il. ri-:i)HTLAi:is, Menke. JJr//voA/////. 



II. ii:.i-:rsTA, Hcclux. / ( <//. 



II. srnsTiiiATA, and II. KXIGUA, Phil. 

 II. I>II.I-:<TA, Monts. 



R. SCAI.AKIS, Midi. = Truiir,,},!/,!. 



R. GoniK'n, Midi. 



II. I:I.ON<;ATA, R. EXCAVATA, Phil. = 0<l"- : 



II. KXIMFA, Jeffreys. = <> 



R. COOPERI, Tryon. = A> 



Genus RISSOINA, d'Orb. 1840. 



Section RISSOINA (sensu stricto). 

 R. INCA, d'Orb. PL 55, fig. 1 5. 



Strong, stout, \\itli tibout 17 elevated, stibobrnjiu 1 . Hcxumi-, iMinrj. 

 ttidinal ribs, and line spiral striae, more prominent on tin- i 

 whorls 7-8, nearly tint, suture crenulated; rosy white. 



Length 8'2 mill. 



Bol 

 II. rvi:AMii)Ai,!s. A. Ad. IM. .").") Hi:. It;. 



Solid, dirty \vhit\ lon^itinlinnlly ohli(|udy plicate, spirally Mriatr, 

 whorls ' s , flattened, .-iitmv <Teimlated. Length, S'"> mill. 



n 



II. A-- 1MII.H. .Jickeli. IM. <',S. jj._ 



Shell solid, white, with 10-11, straight, nnrmw. l..n u ritudin:il 

 cost;e, and much wider intcrstirf<. which show slight, di.Mind 

 >irVe; whorls s, >li-_rhtly COnVCZ, with iinpr-.--ed -uture; lip 

 varicose. Len-'th, S-:) mill. 



24 



