124 THE NAUTILUS. 



for wliicli I propose that of Mr. Pilsbry, the active student of our 

 Pupidie, to whom I am indebted for a number of valuable specimens 

 and facilities to examine such. 



Description : Shell minute, narrowly perforate, cylindrical-oblong 

 to cylindrical, somewhat attenuated towards the rather blunt apex, 

 colorless (when fresh glassy) with a very delicate bluish tint, smooth 

 and polished, w'ith few, irregular, microscopic strise which are more 

 marked near the aperture. "Whorls 42-52 moderately rounded with 

 a rather deep suture esjiecially in the upper half, regularly and 

 slowlv increasing, the embryonal being relatively large, the last some- 

 what ascending toward the aperture ; the latter of moderate size, 

 lateral, subovate, margins approached, peristome somewhat expanded 

 without a thickened lip or a callus in the palatal wall ; outside is a 

 barely perceptible trace of a crest near the margin and behind that a 

 slio-ht impression most marked upon the inferior palatal fold. 

 Lamellse 4 or 5 ; one apertural, rather high of moderate length, 

 simple ; one columellar, horizontal, of moderate size, simple ; basal 

 very small or wanting; palatals the typical, inferior deeper seated, 

 of moderate size, superior small or very small. 



Alt. 1.5-1.7 ; diam. 0.8-0.9mm. 



There is a slight variation ; the example from Xew ^lexico being 

 of lesser diameter, and having no trace of a basal lamella. 



The soft parts have not been seen so far, but will be of high interest, 

 since, to judge from the shell, our species seems to be an intermediate 

 form between the hordeacella, etc., group, and P. curvideus, especially 

 its var. gracilis. 



P. Pilsbryana has much resemblance in shape and size to small, 

 albino examples of P. hordeacella Pilsb.,.but, under a glass, is at once 

 distinguished by the shorter, simple apertural lamella not ending at 

 or very near the upper termination of the palatal margin, as it 

 is in hordeacella, and by the smooth surface ; the fine bluish hue 

 mav also be a distinguishing,character if it prove constant. 



Vertigo (Ti variolosa Gould. 



So far as I know, no specimen of this species from the continent 

 is existing now in collections, that or those in the B. & B. collection 

 having been lost sometime; but in the same, among a number of P. 

 contracta Say, from Jamaica, one has been detected lately. Mr. 

 Henry Moores of Columbus, Ohio, has had one example from Cuba, 

 collected some 35 years ago by John Bartlett, and he was kind enough 

 to lend it to me. It is more conical than in the figure and there are two 



