"I \. 



1{. QLAPHTBA, \Vat>"ii. |M. 84, fig, '-'7. 



Searcely perforate, thin, hyaline, white, apex blunt, .-ntmv 



rowly margined} slightly impned; whorli 5, rerj i''>b|\ riU- 



the Hiture of (he body whorl, very faint l\. -pirally fl:U ridifed and 

 furrowed; outer li p t liin and sharp. Lenirili. I ") mill. 



ftri' Mi/lifuiyi/r /.</.. Tri.fnn tin Ounha; Inn 

 |{. KONIZIAKA, \Vatsmi. IM. i\:\. fig, 



I'mltilicatcd, ruthrr thin. t'r>-ic ( | . not glofltj), I r:ui-|:i i 

 slightly longitudinally piickcrnl hciirath tin- siitun-: uh"i-|- 

 coiivcx, with a narrow, sloping shoithlcr, spirally riil-i l. riil-j--.- .,n 

 l)o(!y whorl "-!>; lip snhrxjiaiKlcd, thick. Length, \'7~> mill. 



.I/-/'// /', 



K. CUOT4NBA, Mnller. PL 63, ii-. 77 : IM. r.4. figs, 95, 96. 



ImperforaU', opa<iiu\ clicstnut color, apex ohtiiM-: whorl- 

 convex, with impressed suture, and distinctly annulate, alnmt I li 

 lines on the last whorl. Length, 4 mill. 



Norway, Iceland, Greenland, Belir ing's Sea, Gulf of St. Lawr> 

 Yar. AI.A>KANA, J)all. Fig. 96. 



Thinner, \\ith rather prominent sutural wrinkles, smaller, \\ith 

 same number of whorls. Under the pale, yellowish epidermis, the 

 shell is pinkish. Length, 2*5 mill. 



Behrings Sea. 

 R. CASTANELLA, Dall. PI. 64, fig. 93. 



Whorls 5, convex, spirally ridged, about 6 to 12 on the body 

 whorl, varying in number; narrowly umbilicated ; peritreme con- 

 tinuous, slightly thickened ; pinkish or brownish white under the 

 epidermis. Length, 2'7 mill. 



lit h rin if s Sea. 

 R. AURIVILLII, Dall. PL (U, fig. !M. 



Narrowly umbilieated, waxen or yellowish ; whorls 5^-6, with 

 strong spiral ridges and concave, much wider in! ; here are 



about 8 ridges on the body whorl; lip continuous, -lightly thick- 

 ened. Length, {:} mill. 



Al 



R. GRIH:\, Marten.. IM. ',.s. li-. \\'l. 



Scarcely umhilicated, semipellncid, reddish irivy, whitish near the 

 aperture, under an a>h colored, radnenns enidermi- : wliirU \. 

 vex, with low spiral ein-ruhe, separated by narrow impn--rd -' 

 lip thickened, interim- oran-'e-conieou-. L- Dgth, - "1 > mill. 



South G' 



