86 AMERICAN SPECIES OP VERTIGO. 



"Pupa ovata forma nov. antiquorum. 2 nun. long; lamellae 

 7 ; three on parietal wall, the central one large and slender, 

 the others very small : two 011 columella, these approximately 

 of equal size, and both rather slender; two on external wall, 

 continued backwards, the upper one large and curved down- 

 wards about its middle. Whorls 4^, body-whorl inflated, the 

 others diminishing regularly and rather rapidly towards the 

 apex, outer lip conspicuously curved inwards opposite the 

 upper tooth on external wall. Posttertiary deposit at West 

 Cliff, Colorado. This form also occurs living, as Dr. Sterki, 

 to whom I sent a. specimen says it 'is of a form of which I 

 have seen examples from many parts of the country, of the 

 same size, shape and formation of lamellae.' ' (Ckll.). 



Translation of the original description of Pupa ovulum 

 follows : 



"Pupa ovulum Pfr. Shell minute, dextral, slightly rimate 

 at base, apex obtuse, shining, brown ; whorls 5, a little convex, 

 narrow, the last one inflated and impressed in the middle ; 

 aperture 6-toothed: two equal teeth on the columella, two in 

 the right margin and two in the left. Length 1, diam. y 2 lin. 

 Vera Cruz (Hegewisch). Very like Vertigo pusilla Mull., 

 but dextral, brown, the whorls less convex" (Pupa ovulum 

 PFEIFFER, Symbolae ad Hist. Hel. i, 1841, p. 46). 



P. ovulum was placed in the synonymy of Pupa ovata Say 

 in the Monographia ii, 1848, p. 361 ; Pfeiffer there referring 

 the figures in Kiister (pi. 14, figs. 1, 2) to ovulum, so it may 

 be inferred that they were drawn from Vera Cruz specimens ; 

 though in the text of Kiister they are called Pupa ovata Say, 

 and a different description is given. The figure is so poorly 

 drawn that it might represent any form of the ovata group. 



Subsequent collectors do not appear to have found the 

 Vera Cruz form. Its identity with V. ovata remains to be 

 verified. There are no recent records of V. ovata from Mexico. 



Antillcan forms provisionally referred to V. ovata. 



Forms which appear referable to this species are before me 

 from Porto Rico, Santo Domingo and Cuba; and the species 

 described as Vertigo neglecta and Pupa hexodon, from Cuba 



