Occasional Papers of the Museuin of Zoology 5 



PUPILLID.E 

 Piipoidcs siuioni (Jousscaume) (1889)? 



One fresh specimen. The peristomal calkis is not well de- 

 veloped ; the parietal callus is especially weak, in fact, prac- 

 tically lacking. Xo angular tubercle nor reddish band shows 

 on the throat of the aperture. The axial striations are distinct 

 on the lower whorls. With ^Vi whorls, the specimen meas- 

 ures: altitude. 3.9 mm.; greatest diameter, 46 (1.8 mm.). It 

 appears closest to P. modiciis (Gould) (1848), but may pos- 

 sibly be a youngish specimen of P. marginatus nitidulus (Pfr.) 



(1839). 



ACHATIXID.E 



Lcptiiiaria (Xcosuhulina) gloynii (Gibbons). Figs. I-i, 2, 3. 



Cionella gloynii Gibbons (1879), (gloynei auct.), Curacao. 

 Neosiibidina liartcrti Smith (1898), Buen Ayre. 

 L. gloynii miniiscula Pilsbry (1907). 



Thirty-seven specimens, from crevices of rock and among 

 rock-fragments. From the variation in the lot before me. I 

 can see no reason for the specific separation of any of the 

 forms included in the above synonomy. From the figure, 

 L. liartcrti appears less attenuate towards the apex. E. A. 

 Smith, from his list of species of Curacao, was apparently not 

 acquainted with even the description of L. gloynii. 



The embryonic whorls of these specimens have close and fine 

 axial striations, which become somewhat coarser on the later 

 whorls. The egg is of quite large size, and the slender em- 

 bryonic shell contains i]\ whorls. The spiral lamelL'e on the 

 columella extend back 4 whorls from the aperture, and the 

 parietal one is present in young shells. My specimens show 

 considerable variation in size, apparently not entirely due to 

 age. An individual measures : 



