200 BULLETIN OF THE 
Vertigo approximans, STERKI. 
In 1887, Mr. A. A. Hinkley, of Dubois, Ill., sent me, with other Pupide, one 
specimen of a Vertigo, probably new, and in 1889 another of the same. The said 
gentleman and Mr. William A. Marsh kindly forwarded me all their Pupide for 
examination, but so far I have found no other example, yet I am satisfied such will 
be found. The form is related to Vertigo ovata and Gouldii, but different, and is 
characterized by the two palatal lamella being close together, for which reason I 
gave it the manuscript name V. approximans. 
Vertigo approximans, SrerKt, The Nautilus, 1890, p. 186. 
‘Lhe above is Sterki’s description. 
Vertigo rugosula, STERKI. 
Related to V. ovata and Gouldii; in shape more elongated than the latter, more 
cylindrical, and somewhat larger. Apertural parts and lamelle much like those of 
ovata; but the columella is decidedly longer and straighter, and the inferior colu- 
mellar lamella is distinctly placed on it. Length 1.8-2.0, diameter 1.1 mm. Of a 
peculiar formation is the surface. Of the five well-rounded whorls, about one and 
a half of the upper are nearly smooth; the following, with exception of 
the last, are distinctively and regularly striated; the last is very finely 
but distinctly rugose in the sense of the lines of growth, near the aper- 
ture again striated. Color, dark chestnut. 
This is a beautiful species, of which I saw the first example in the 
collection of Mr. Bryant Walker, who had found it in April last at 
Pass Christian, Mississippi. Last September, Mr. W. G. Mazyck col- 
lected a number of them on Sullivan’s Island, S. C. In either place 
they were in company of Pupa rupicola, Say. Quite lately I have seen 
one example from Lee County, Texas, sent by Mr. J. A. Singley; it was a dead 
shell, and not fully mature, but recognizable. The species consequently seems to 
be widely distributed along the South Atlantic and Gulf coasts. Two specimens 
were sent in by Mr. H. Hemphill, who collected them at Fish Camp, Fresno Co,, Cal. 
In Eastern Florida, Volusia County, etc., a form has been found to be quite com- 
mon which I refer to this species, but as a distinct variety which may be called 
ovulum. It is somewhat smaller, ovate; the striation and rugosity of the surface 
are less marked, and the inferior apertural lamella is wanting. In turn it has in 
most examples a lamella at the base (between inferior columellar and inferior 
palatal), and the callus in the palatal wall is rather strong. The coloration of part 
of them is somewhat lighter. It cannot be confounded with V. ovata, Say, its rela- 
tions to the type of rugosula being evident, and, in addition, ovata has been found 
with it. Nor can it be referred to ventricosa. It is larger and stronger, of much 
darker color, its surface is not so smooth and polished, it has three or even four 
Jamelle more, and the columella is longer. 
Vertigo rugulosa, Sterri, Proc. Acad. N. Sci. Phila., 1890, p. 34. 
V., rugosula. 
The above is Sterki’s description. The figure was drawn by him. 
