2 GO EUlilMID^. 



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 mucronate, nucleus sinistral ; aperture subquadrangular. 

 Parasitic on Asteria and Ophiura. 



Subgenus Lambertia, Souverbie, 1869. 

 Shell pupiform, white, very smooth, polished ; spire mucro- 

 nate, C3dindrical. 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^, 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 



