298 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 6 



EXPLANATION OF PLATE 37 



Figs. 



1,2. Robulus strongi Church. X 14, p. 295. 

 3,4. Robulus cf. cultratus Montfort. X 33, p. 296, 

 5-8. Robulus cf. cultratus Montfort, var. X 14, p. 296. 



In all specimens, a, side view; b, apertural view. 



All of the illustrations on Plates 37-48 were drawn by Russell D. Cangialosi and 

 Alfred J. Van Auker. 



