RIS8OIA. 



evanescent on lower part of body-whorl, where the <piral sculpture 

 lu-s more prominent ; lip thiekeiKMl. Length. ", mill. 



En, 



The synonyms are A*. ci/rj<>.-<f<>iti<if<i, lleclu/,, and 7?. scalar! fur in IK, 

 Thorpe. Jeffreys adds /,'. oarinata, Aradas, and A'. r<i/m/i<-ulata, 

 I'hil. 



R. CKISPA. Watson. PI. CM. fig, 



Ilimate, rather solid, somewhat shining, suhvitreons, wliite, a 

 little orange-tinted, \\ith about 12 obtiqw crate, vanishing below, 



I d by spiral lira 1 , of which there are 7 on the last whorl, 

 Mroiiger below, the intersections crispate ; whorls .">-(;, convex, gra- 

 date, suture deep ; lip thickened, externally crenated. 

 Length, 2 mill. 



Mmlt /'//, ( 'anaries. 

 II. M AVI.M. Friele. PL 65, %. 28. 



More or less rimate, solid, reddish brown; whorls .">, carinate, 

 with sloping shoulders, costate above, nodose at the carina. spirally 

 lirate below. Length, ") mill. 



Arctic Oo'in. 



I-'ir>t published as R. Jan-Mayeni; subsequently simplified as 

 above. 



Friele has described a var. ALBA. 



II. -iMri.ANs. flouts. Unfigured. (R. Wntwni, Monts., not 

 Schwartz.) M nliterranean. 



Section FOLINIA, Crosse, 1868. 



II. INH;M>, Folin. PL 63, fig. 70. 



Turreted, distantly obliquely ribbed, the ext n-mities of the ribs 

 undulating the shoulder of the whorls, spirally siriate : whorls ft, 

 rapidly inereasinir: li[) wide, outer margin crenulated. 



Length. -2-2 mill. 



Tlie remarkable distinctive character o{ this group is the small 

 posterior sinus of the aperture. 



II. THAI; \>M< \ an<l II. ( 'u:< ! \ i i:.i;. Folin unfiured. 



