On the Family Proserpinacea. 15 



II. PROSERPINA GRAY. 



T. imperforata, helicinfeformis, subglobosa vel depressa, laevigata, 

 utrinque callo nitido obducta ; columella unidentata ; paries aperturalis 

 lamina 1 vel pluribus spiralibus munitus; apertura lunaris, ssepe laminis 

 palatalibus coarctata ; perist. simplex, rectum. 



Pfeiffer divides this species into the two following sections : — 

 A> Lamellis palatalibus instructs, (Genuince) § I., Nr. 1-2. 

 B. Lamellis palatalibus careutes, (Odontostoma Orb.) § IL, 

 Nr. 3-6. 



§1- 

 1. P. nilida Gray. 



— apertura " lamellis 4-5 coarctata : 1 maxima in ventre auf. penul- 

 timi (interdura superposita secunda, minore, profundiore, illiparallela), 



1 horizontali, subtorta, valida ad columellam, 2 parallelis in basi anfrac- 

 tus ultimi."* 



Hab. — Jamaica. 



2. P. lingsiifcra Jonas. 



(3. minor. P. pulchra C. B. Adams. 



— apertura " 5 plicata : plicis 2 insequalibus in ventre anfr. penultimi, 



2 parallelis in margine basali, quinta valida, transverse prominente ad 

 columellam." 



Hab. — Jamaica. 



§ II. 

 3. P. pissiin C. B. Adasns. 



— apertura bidentata : " dente 1 transverso ad columellam subverti- 

 calem, altero approximato ad parietem aperturalem." 



Hab. — Jamaica. 



* Pfeiffer gives the following measurements of this species — Diam, maj. 9, nun. 8, 

 alt. 4 mill. I have a specimen, Diam. maj. 11, min. 10, alt. 5 mill. The presence 

 of the second parietal tooth is the rule rather than the exception. 



