260 EVLIMID^). 



Subgenus APICALTA, A. Adams, 1862. 



Shell solid, spire twisted with decidedly mucronated apex, 

 aperture oblong. 



Subgenus MUCRONALIA, A. Adams, 1862. 



Shell subulate, straight, often colored, pupoidal, with mu- 

 cronate apex ; aperture oval-oblong. 



The distinction between this group and Apicalia is a very 

 slight one. 



Subgenus SELMA, A. Adams, 1864. 



Shell oblong-ovate, subdiaphanous ; spire short ; last whorl 

 large ; aperture elongately ovate ; columella arcuate, obliquely 

 subplicate. 



Subgenus STYLIFERINA, A. Adams, 1860. 



Shell oval-conic, diaphanous, thin, smooth ; whorls numerous ; 

 apex inucronate, nucleus sinistral ; aperture subquadrangular. 

 Parasitic on Asteria and Ophiura. 



Subgenus LAMBERTIA, Souverbie, 1869. 



Shell pu pi form, white, very smooth, polished ; spire mucro- 

 nate, cylindrical, the summit mamillated ; whorls few ; aperture 

 semilunar, peristome continuous ; the outer lip sharp, the inner 

 lip a little reflected at the 'base, columella slightly twisted. 

 Operculum unknown. 



Subgenus AMAURELLA, A. Adams, 1867. 



Shell small, oval, imperforate, white, shining, summit mamil- 

 lated ; lip and columella thick. 



Resembles Macrocheilus in miniature, and is, perhaps, more 

 nearly related to Stylifer. 



Subgenus EULIMOPSIS, Brugnone, 1880. 



A fossil group ; the base concentrically striate, whorls scarcely 

 convex, suture distinct, aperture subrhomboidal, lip sinuous, 

 columella twisted, base subchanneled. 



E. CARMEL^E, Brugn. Pliocene, Sicily. (Struct, and Syst. 

 Conch., ii, t. 68, f. 84.) 



Subgenus IOPSIS, Gabb., 1873. 



Shell very small, smooth, polished, spire elevated, suture 

 nearly obsolete, columella slightly twisted, forming an imperfect 



