84 THE NAUTILUS. 
States, with illustrations of many of the species, by W. H. Dall, 
A.M., Honorary Curator Dept. of Mollusks, U.S. Nat. Mus. (Bull. 
U.S. Nat. Mus. No. 37). “This work is intended to assist students 
of the Mollusca in the United States, by bringing together for their 
use a large number of excellent figures of species belonging to or 
illustrating the fauna of the Southern and Southeastern Coasts of 
the United States, from Cape Hatteras south to the Straits of Florida 
and west to Mexico, with the adjacent waters. These figures are 
explained and connected by a catalogue of the mollusks known to 
inhabit that region.” The extreme northern and extreme southern 
range of each species is given, and its presence in New Jersey, 
Virginia, Hatteras, Georgia, East Florida, Florida Keys, West 
Florida, Texas, West Indies, Bermuda, Europe and West America 
is indicated in parallel columns. The catalogue thus comprises a 
dozen local lists rolled into one, and put into the most convenient 
possible form. We would recommend students working at localities 
included within the limits above given (Hatteras to West Florida), 
to use this work as a foundation, and omit in lists for publication 
the species enumerated by Dr. Dall, unless they are peculiar or 
local in distribution. As a hand-book for collectors of our southern 
marine shells, the volume is indispensable. The plates number 74, 
and illustrate by excellent line-engravings about one-third of the 
total number of species (1,655) enumerated. 
A Srupy oF THE AMERICAN SPECIES OF VERTIGO, by V. Sterki, 
M. D. (Proc. U. S. Nat. Mus. 1888, 10pp. plate). In this paper 
Dr. Sterki directs attention prineipally to the form of the last whorl 
and the aperture-folds of Vertigo, and the relations of American to 
European species. A convenient formula is given for expressing 
the combinations, positions and relative importance of the teeth, the 
principal or primary folds being designated by letters, the smaller 
secondary ones by dots. Several species included by him in Vertigo 
(e. g., P. pentodon) are said to be real Pup, by high authorities, 
and possess distinct tentacles. These tiny fellows require further 
study. The subgenus Angustwa is proposed for our V. milium 
and the European V. venetzii. The group is apparently a natural 
one, but the name proposed must give way to Moquin-Tandon’s 
Vertilla, proposed in 1855 for the last-named species. The figures 
are excellent, and the whole paper is highly instructive and sug- 
gestive, giving evidence of much careful research. 
