458 



THE CANADIAN NATURALIST. 



[Vol. ix. 



Descrijytion.^ — Shell small, helicoid. Length two and five- 

 tenths millimeters, width two and eight-tenths millimeters. Spire 

 little elevated. Nucleus small. Whorls four, somewhat flattened, 

 with the suture little impressed. Base somewhat excavated, 

 with large umbilicus. Aperture oblique, suboval, somewhat 

 regularly rounded. Lip simple. Surface marked with uneven 

 striae and somewhat more conspicuous ridges of growth. Angle 

 of divergence about 130°. Shell thin and probably horny. 



12. 



15. 



.m!^mm 



0% 



mW0 



14. 



ct 



X 70 



Fig. 12. Daivsonella Meekly X 8 ; 13, same, section of aperture, 

 X 16 ; the outer edge of the lamella is imperfect. 14, Markings of 

 surface X 100: {a) Pupa vetusta ; {b) Pupa vetusta var. tenuistriata ; 

 (c) Pujya Vermilionensis ; (d) Zonites priscus. 15, Strophites ffrandseva, 

 natural size, and magnified 8 diameters. 



This little shell was discovered in 1866, in the bed already 

 referred to as the lowest of those at the South Josrcfins in which 

 Pujya vetusta has been found. Shortly after I had discovered 

 this bed, being impressed with the probability that it might 



Slightly modified from Carpenter. 



