M ! 



harp. tlexuou.-. longitudinal ridge-, and no spiral -nil pi 11 re. 

 ih. I''., mill. 



Madtommecm, Ho*/ <,t' /;;.,,,/, 1C. Africa, .1 



A. UN M.INA. \V:it>on. IM. 17, tig. " % _ > . 



Minutely umbilirated, thin, glo>sy, while; whorls 12, OWN 

 smooth or with taint indications of ribs, opccially on tin- upper 

 \vhorls, under a lens the snrf'aee appear- angulatrd ,,r malleated 



with sliirht decussating striee. Length, in mill. 



Off Pernambuco, ')"><)/'///.<. 



A. jEFFBEYBn, Tryon. IM. is. fi-r. 09. 



Thin, seniiti-aiisj.ai-eiit, glossy, whitish; whorls s, very slowly 

 (MilarniiiL:-, with close, longitudinal, thread-like rildets, ami vei-y 

 sli^lit microscopic spiral stria-; no umbilicus. Length, .')'7"> mill. 



7'//,//.s ; II'. ( 'o,it of Af,-;r,i, 300-1261 fau. 



Described by Dr. Jeffreys as A. striata, a name preoccupied by 

 Prof. Verrill. * 



A. MI /ON, Watson. PI. 17, fig. 51. 



Thin, lustrous, white; whorls 1~>-16, convex, with about 40 

 feeble, unequal, rounded riblets; minutely umbilicated. 

 Length, 15 mill. 



Teneriffe. 



Section PHERUSA, Jeffreys, 1869. 



A. GULSON.E, Clark. PI. 17, fig. 43. 



Very thin, transparent, lustrous, clear white, without sculpture, 

 spire with a blunt, nearly globular apex, which is decidedly intro- 

 verted but not sinistral ; whorls (J-7, convex, with deep suture; 

 outer lip remarkably flexuous, prominent, expanding, almost 

 notched below; umbilicus closed, but with a chink-like depression. 

 Length, 1'7 mill. 



Europe, Mul !,>/. 



Section IOL^EA, A. Adams, 1860. 



\. BCTTULA, A. Ad. PL 17, fig. 44. 



Rather solid, white; whorl> 15, slightly convex, with subdistaiit 

 spiral grooves, the interstices longitudinally tinely striated. 

 Len-th, :', mill. 



St ft if <>f Corea. 



