EXPLANATION OF PLATE XXXIX. 



( KIOCKRAS FLINDERSI, McCoy, ■-/■. 



Fig. 1. Lateral view of part of a large whorl (McCoy's type) with a portion 

 of the convex venter defined from the Hank by the longitudinally 

 elongated tubercles ; the costae are curved. Three-quarters natural 

 size. 



,, 2. Lateral view of a natural cast, with sigmoidal costse, and similar 

 tubercles to those si en in Fig. 1. 



,, 3. Ventral view of Fig. 2. In nearly every instance the costse crossing 

 the venter are double. 



