Number 64 March 17, 1919 



OCCASIONAL PAPERS OF THE MUSEUM OF 

 ZOOLOGY 



UNIVERSITY OF MICHIGAN 



Ann Arbor, Michigan Published by the University 



A NEW SPECIES OF CAMPTOCERAS 

 By Bryant Waeker 



Camptoceras hirasei, new species 



PI. I, figs. 1-8 



Shell sinistral, very slender, aciculate, horn-colored; whorls 

 3J^, flattened laterally, strongly carinated above and below, 

 separated by a broad, deep, concave channel, apical whorl 

 bluntly pointed, bullet-shaped, reticulated by exceedingly fine 

 lines of growth and spiral stride, on the succeeding whorls the 

 longitudinal striae increase in size to a maximum on the body- 

 whorl, while the spiral lines become more or less obsolete and 

 are scarcely, if at all, visible on the body-whorl; aperture 

 solute, elongate oval, narrow, somewhat wider below, angled 

 above and below ; lip continuous, the peritreme being slightly 

 thickened and a little reflected on the lower, inner margin. 



Length 7.25; diam. 2; aperture, length 3.5, diam. 1.5 mm. 



Type Locality : Near Osaka, Prov. Kawachi, Japan. 



