EXPLANATION OF PLATE XLVIII. 



Crioceras lam pros, Eth.jil. 



Fig. I. Literal view of an imperfect but fine shell, partly testiferous, 

 measuring two feet across the longest diameter. The strong cristi- 

 i'orm, distant costiu with three tubercles on each are veiy notice- 

 able : the bitter are abdominal, infra-abdominal (or lateral) and 

 supra-dorsal in position. At the proximal end the test has been 

 entirely removed, revealing the sutures. 

 .. •_'. Ventral view of Fig. 1, exhibiting a broad, generally convex venter. 



