24 THE NAUTILUS. 



called it " Cryptogramma arakana." The correct form is used by 

 Sowerby, on p. 33 of his Supplement to Marine Shells of South 

 Africa. H. A. PILSBRY. 



A DISTORTED OYSTER The most curious distortion that I havfi 



seen was handed to me by a parishioner a few days ago. The species 

 is the common oyster taken from the Sound here (Branford, Conn.) 

 The earlier growth is 4^ inches long, 1| inches wide, the shell then 

 shoots off to the right at an angle of 100 and continues 2^ inches 

 with a width of 2 inches. It next turns to the left at an angle of 

 120 and adds 2 inches more. This is the external appearance 

 Owing to the fact that in each case the animal abandoned a part of 

 the shell and built from the middle, the internal appearance is a 

 double curve. HENRY W. WINKLEY. 



PUBLICATIONS EECEIVED. 



SYNOPSIS OF THE GENERA, SUBGENERA AND SECTIONS OF THE 

 FAMILY PYRAMIDELLID>E By Wm. H. Ball and Paul Bartsch 

 (Proc. Biol. Soc. Wash. XVII. pp. 1-16, Feb. 5, 1904). The 

 family consists of four genera Pyramidella, Turbonilla^ Odostomia 

 and Muschisonella. The former is divided into 20 subgenera for 10 

 of which new names are proposed. Turbonilla consists of 12 sub- 

 genera of which five are new, and Odostomia 37 subgenera, eight of 

 which are new. Four new species are described viz. P. dodona, 

 T. archeri, 0. pilsbryi and 0. americana. An elaborate system of 

 subgenera and sections is proposed for the wonderfully varied and 

 numerous forms of this difficult family. The work has long been 

 needed, and when suitably illustrated will be of great utility. C.W.J. 



A LIST OF SHELLS COLLECTED IN WESTERN FLORIDA AND 



HORN ISLAND, Miss By E. G. Vanatta (Proc. Acad. Nat. Sci., 



1903, pp. 756-759). The 119 species enumerated were collected by 

 Mr. Clarence B. Moore, while engaged in archaeological researches. 

 Vitrinella mooreana, Erycina floridana and Ouna dalli are described 

 as new. C. W. J, 



