PUPA. 



211 



T/mfjnnl mombrane with 25 teetlj(12 — 1 — 12) in each row. Central teeth very 



Fniall, tri(usj)l(l ; laterals bicuspid, inodificMl into serrat<!(l marginals. (I'ig- 14.) 



Genitalia unobserved. 



Fitr. 114. 



Fig. 115. 



Pupa pellucida. 



Lingual dentition of Fupa corlicaria. 



Pupa pellucida, Pfr. 



Shell subperforate, cylindrical, thin, pellucid, shining, pale yellow, spire 

 somewhat attenuated, apex obtuse; whorls 5, convex, the last flatter than the 

 penultimate; aperture semi-oval, with 5 teeth; single strong 

 teeth on columella and parietal wall of aperture, two moderate 

 ones on right side, a fifth small basal one within the aper- 

 ture ; peristome simple, its right end expanded, its columell.ir 

 end reflected. Length, 2 mill. ; diameter, scarcely 1 mill. ; 

 aperture, scarcely | mill. long. 



Pupa pellucida^ Pfeiffer, Symbolae, I. 46 ; Mon. Hel. Viv., II, 

 360; in Rimer's Texas, 456. — Kuster, in Chemnitz, ed. 2. 

 89, PL XII. Figs. 24, 25. — W. G. Binney, Terr. Moll, IV. 147; L. & 

 Fr.-W. Sh., I. 246 (1869). 



Piqya scrvilis, GouLD, Bost. Journ. Nat. Hist, IV. 356, PI. XVI. Fig. 14. — 

 Pfeiffer, Mon. Hel. Viv., II. 360. 



Pupa Riisei, Pfeiffer, olim, Mon. Hel. Viv., III. 532. — Ktjster, in Chem- 

 nitz, ed. 2, 176, PI. XXI. Figs. 13, 14. 



Leiicochila pellucida, Tryon, Anier. Journ. Conch., IV. (1868^. 



A West Indian species quoted by Pfeiffer from Texas, but not elsewhere 



noticed ; it is probably confined to the Texan Subregion. I have seen no 



specimens of it. Fig. 115 is a fac-simile of that of P. servilis. 



Animal unobserved. 



Pupa borealis, Morelet. 



Shell riraate, ovate-oblong, shining, diaphanous, reddish horn-color, with 

 miscroscopic revolving stria; ; whorls 6, rather convex, the last compressed be- 

 low, forming a medium-sized excavation ; aperture somewhat rounded-oval, 

 moderate, four-toothed, one deep, foldlike, on the parietal wall, one columellar, 

 the rest smaller, palatal ; peristome simple, straight, its columellar extremity 

 slightly dilated above. Length, 3 mill.; width, 1^ mill. (Morelet.) 



Pupa borealis, Mokelet, Journ. de Conch., VII. 9 (1858). 



An Asiatic species, said also to be found in Alaska. 

 Animal unknown. 



