\ I . \ I : I \ . 



8, 91 n i: LOB, Hiiuk IM. !;, li 



Narrow, whitish, stained with brown, minutely >|iirally Mriated ; 

 whorl.- !I-10, convex. Contiguous, rather compressed, keeled and 

 ved at the suture, with very infrequent rounded varices. 



Lenirth, ! mill. 



B, . i M< n. \ TA, Brocchi. IM. Hi, fin'. 17. 



Reddish brown, whorls s, wdl rounded, with fine, close, longitu- 

 dinal lamella 1 and occasional thick varicr-. Lniirth, 1 in. 



At /in/fir mid Mediterranean Europe. 



First (It-scribed as a pliocene fossil. Recent specimens are occa- 

 sionally dredged at considerable depths. 



S. Tri:i:i< n.A, Sowb. PL 16, figs. 13, 4, 6. 



Covered perforate, rather thin, turreted, white, often with two 

 Taint chestnut bands, with very close fine spiral lirse; whorls 8-9, 

 with 1*2-13 lamellae, some of which are varicose. Length, 18 mill. 



West lH(fI*.-<. 



S. turrit'i. Xyst is a synonym; S. nuda, Sowb. (figs. 4, 6), 

 described without locality, appears to be another. 



S. UNKATA, Say. IM. l<i, ii-s. 14,9. 



Shell thick, shining, porcellanous, w r ith traces of fine lamella, 

 with wiK-r interspaces, and occasional varices; whorls (5-7, moder- 

 ately convex, white or yellowish or brownish white with two narrow 

 chotmit hands, the lower one the most conspicuous. 



Len-th, 1-J-1-") mill. 



Hniith,-,-n Af/'Uitir Cnttxt of tll<> I 'it it>'<! Stuff*. 



:iirure rrj)re>eiits a specimen in which the lamella 1 are 

 unusually developed, whilst the normal denuded state is 

 il>ed a- a new speci>, \ uni'mttntu, Sowerhy ( ti_ir. U), and 

 rhanire<l by Canefri to N. /'YxrA/r/////'/ on account ot'.S. miciii'if/' 

 d'Orb, mistaken by him for iuiir,^fntn. 



S. I;I;,:,,\,;A. Canefri. IM. Hi. ti- 7. 



Attenuated, smooth, whitish, with fulvous apex, whorls 8, convex, 

 with rare varices. Length, 1* mill. 



? I'in't Jiti'kfinn, Au.*ti-'l/i<i. 



Wronirly t inured by Sowcrby for \ Mnrrhi, Auiras, which is a 

 very ditleivnt >pcci->. 



