84 THE NAUTILUS. 



States, with illiistratioi\s of many of the species, by AV. 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 bringins: 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 AVest 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 (l,(j35) enumerated. 



A Study of the Americax Species of VepvTigo, by V. Sterki, 

 M. D. (Proc. U. S. Nat. Mus. 1888, 10pp. plate). In this paper 

 Dr. Sterki directs attention principally 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 

 princijial or primary folds being designated by letters, the smaller 

 secondary ones by dots. Several species included by him in Vertigo 

 (e. g., F. pentodon) are said to be real Pup£e, by high authorities, 

 and possess distinct tentacles. These tiny fellows require further 

 study. The subgenus Angnstula is proposed for our V. milium 

 and the European V. venetzii. The group is apparently a natural 

 one, but the name pi'oposed 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. 



