ORTirOCERATID^ 
3 
Fig. 1. 
- - fj 
>;i!" : 
J Ij 
Orthoceras KinneTcullense. — a, fragment of the septate part of the shell (about 
one half of it), with some of the test remaining ; natural size (s, siphuncle) ; 
h, portion of the test, greatly enlarged ; c, outline of the entire specimen 
reduced one half ; d, outline of section, restored from another specimen, 
showing siphuncle at s. 
