IA. 



fa OPAI.IA. II. iV A. Adams 1853. 



. IIin.lv PI. i:>. tig. 74. 



\Vhiti.-h. \\horl- ventricose, smooth, very rapidly enlarging, lamellae 

 di-tant. broadly expanded above. Length, ! mill. 



Amboi/ii<i. 



>-sc ami Fisher. PI. l-'J. tig. 1 1. 



Narrow, whitish, whorls 11, rounded, in contact, with regular 

 -imple lamellae, base with spiral ril>. Length, 1M mill. 



S. PHII.I AT\. Watson. PI. 18, fig. 78, 



Tliin. -uhhyalinc. white: whorls 7. flatly convex with deep suture, 

 with about _>.">. longitudinal l)li(pic lamella', cut across l>y two or 

 three -tr'>n L r -piral t'urri\\s, causing the lamella- to appear in prickly 

 interrupted series, base with a spiral thread. Length, 2*5 mill. 



Tri.<t<,,, ,rArt,,,hft, (100 to 150 fms.) 



MII.I.'-\. Lam. PI. l.l, fi.Lrs. M. 7<i, 77, 82, 83. 

 Wlmrls about *, well rounded, smooth, flesh color, more or less 

 drtinitely darker banded at the suture and above the basal rib, and 

 intermediately marbled, lamellse thin, white, blade-like, continuous. 

 j-th. 1-1'.") in. 



M'lllti i'i-'Dif'an, West Indies, &t mlin'rh />. 



\ include here several species which I find it impossible to 

 separate by characters of value. Morch (Jour. Philad. Acad. VIII, 

 _''" -ays that the Mediterranean S. pseudoscalari*, P>rocchi (fig. 77) 

 differ.- in beinu r narrower, with e<jual ribs, and that the Polynesian 

 S. pc rji/'.rti. Pease i fiL r . 83), has single hi_L r h. alternatin.ir with }>airs 

 of l.\\er rib-; but both the-e forms differ widely in series of 

 - and :ire clearly traceable one into another. 



I al-o include here S. mro/mtn,. Lam. (tig. 7<>) said by Kiener to 

 f'ron, CajH- of Good Hop,., and by M.irch believe<l to be We-t 

 Indian: it a|.jK;ars to bi' merely a wrll-grown N. lnmflln*ti, the number 

 of lamella- varying. 



Thi- i- N. dct&rw of LiniKcii-, VI Kdit. mot Knh Kdit.> and Ojf 

 moet American authois. and N. ,n, ,,,<-,,</,,. Lain. (tig. X'J >. Mon- 

 teroaatO has given the new name <,f r,,,i,,iiiitiit,i to the Meditei-ranean 

 ^pecimenn because, he says, that of N. !,,,n>lln.^i \~ preoccupied by 

 BFCM-' l:ir-c (iriLMion fo.-.-il. and the true S. pseudwnlnr'm, 



-hi i- -oinewhat spinoee. It does not seem advisable again to 



