tI7 MKI.Vti.I. : ON lATIRl'S ARMAILS AD. 



Tlic true Lalirus cnriui/erus Lni. from the Pacific is ciuite distinct. 

 In tliis tlie shell slopes away immediately below the very prominent 

 median spiral angulation at the last whorl. Indeed the abundant 

 /. polygonus will remind one more of the typical Z. annatiis, but the 

 whole texture being so different, no one could for an instant sup- 

 pose that they were identical. 



California, given by Adams as the habitat of the Cumingian type, 

 must be erroneous. I see no reason for altering the secjuence of this 

 S[)ecies in the catalogue of Latirus and Periiternia, with Z. distinctits, 

 L. cariniferus, and Z. po/ygonus as nearest allies. 



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