160 BULLETIN OF THE 
Bulimulus Schiedeanus, Preirrer. (p. 391.) 
Plate III. Fig. K. 
Jaw slightly arcuate, ends scarcely attenuated, blunt ; anterior surface with 
17 ribs, denticulating either margin. It is difficult to decide the exact charac- 
ter of these ribs. I have usually called the ribs in Bulimulus, Cylindrella, ete. 
narrow and widely separated. They should perhaps be described as very 
broad, with narrow interstices, and with a gradual increase of thickness towards 
their outer longitudinal margin. This plainly thickened margin is what I have 
formerly described as narrow ribs. In the jaw before me there is no tendency 
to oblique arrangement of the ribs at the upper central portion. 
The lingual membrane (see plate) is long and narrow. Teeth of the same 
type as described by me under Bul. dealbatus, Say, in Vol. V. 
Bulimulus multilineatus, Say. (p. 395.) 
Mexico (Fischer and Crosse). 
Orthalicus undatus, Bruce. (p. 408.) 
The upper figure of Plate LIV. is referred by Von Martens to O. Ferussaci. 
Succinea ovalis, Goutp. (p. 417.) 
To the synonymy add : — 
S. Calumetensis, CaLKins, Valley Naturalist, Vol. I. No. 2, p.1, with a figure. St. 
Louis. 
Spurious Species oF HELICIDZ. (p. 431.) 
Clausilia acrolepia, ‘ L’ Amérique Russe” is a typographical error for “ L’Arménie 
Russe.” Zool. Rec., 1881. _ 
In the following list I have incorporated all the foregoing additions and 
alterations. 
