274 NORTH AMERICAN FAUNA. [Ko.7. 



Bulimulus serperastrus Say. 



Hidalgo, Tamaulipas, Mexico (Mas. No. 123595), William Lloyd. 



Three good examples of this pretty species, the largest 25""" long. 

 Like other species of the group, it varies considerably. Some individ- 

 uals are much slenderer than others; hence, quite likely, the following 

 synonyms from Biuney's Land and Fresh . Water (Shells of North 

 America (Part I, fig. 335, p. 102): 



JiuUmus liebmanni Pfr. 

 Balimus ziehmanni livo 

 Bulhnus nitelinus Eve. 



I agree with Binney; he is no doubt correct in the above inclusion. 

 Perhaps the californicus of Reeve, Conch. Icon., 378, is a geographical 

 aspect of serperastrus. 



Succinea luteola Gould. 



Hidalgo, Mexico (Mus. No. 123598), William Lloyd. 



Three examples of fresh specimens. 



Succinea oregonensis Lea. 



Kern Kiver, California (Mus. No. 123597), Vernon Bailey. 



The four living examples were detected by Mr. Bailey at an elevation 

 of 2,700 feet. 



Suborder HYGEOPHILA. 



Limncea caperata Say. 



Ash Meadows, Nevada (Mus. No. 123598), Dr. A. K. Fisher. 



Numerous specimens, all dead and bleached. Some of these are 

 moderately angulated on the upper part of the basal whorl following 

 the suture; others strongly malleated; all of them are rather solid, and 

 the surface in many instances nearly smooth; in some examples the in- 

 cremental lines are sharply defined; in one the basal whorl is quite 

 shouldered above and malleated below, with hints of interrupted 

 threadlike keels (lirse), on the same whorl near the columella. Cooper 

 (Geog. Cat. No. 348) credits this species to l S. F. to Oregon,' i East- 

 ern States.' Hemphill includes it (No. 01) in his little catalogue of the 

 land and fresh water shells of Utah. Call credits it living to i Warm 

 Springs Lake ' in the Bonneville Basin, Bull. U. S. Geol. Survey, No. 

 11, 1884. .My remarks relating to Limncea palustris in Proc. U. S. 

 National Museum, Vol. xiv, 1801, are also applicable to the foregoing 

 species. 



Limncea nuttalliana Lea. 



=L. paluatrus Mull., var. 

 Panamin't Valley, California (Mus. No. 123599), Dr. C. Hart Merriam. 



Several examples with an unusually acute drawn-out spire; the 

 largest a nearly typical nuttalliana; nevertheless, this, like many other 

 so-called species of Limnwa, is but a local expression or variety of the 

 world-wide palustris. 



