100 LAND AND FEESH-WATER SHELLS STEARNS. 



Cave by Mr. Lloyd, and are of uuusiial size. The remarks following- 

 Mr. Bailey's Del Rio specimens apply equally well to these. 



Holospira Roemeii Pfr. 



Painted Cave, moutli of the Pecos River, Texas. (Mus. No. 118388.) Two examples ; 

 also in tlie Devil's River region, Texas, a single specimen (Mus. No. 118393). "Wil- 

 liam Lloyd. 



Number of whorls, varying from thirteen to sixteen, and the speci- 

 mens also show some difference in robustness. 



Previously reported from Texas by Mr, W. G. Biuney, who also 

 notices the point that some individuals are more ventricose than others, 

 and that the number of whorls varies from " twelve to fourteen," 



Holospira arizonensis Stearns. 



Dos Cabezas, Arizona, two specimens uiul numerous fragments collected by V. Bailey 

 November, 1889 (Mus. No. 104;!92). 



Described in the Proceedings of the United States National Museum, 

 pp. 208-11, vol. XIII, Figs. 2, 3, PI. xv. 



Siiccinea luteola Gould. 



Texas, Painted Cave, month of the Pecos River, William Lloyd (Mus. No. 118391). 

 Arizoua, near Wilcox, on dry alk ill flats, November, 1839, Vernon Bailey (Mus. 

 No. 118373). 



The bleachen aspect resulting from these alkaline and arid stations is 

 also seen in examples of Snccinea that inhabit sandy reaches along the sea- 

 board where the vegetation is sparse and its substance ligneous rather 

 than succulent and more saline than in places farther from the sea. 



Succiiiea avara Say. 



Bridger's Pass, Wyoming, "near a spring in the canon." V. Bailey (Mus. No. 

 118483). 



Succinea campestris Say. 

 Texas, near Sanderson, William Lloyd (Mus. No. 118363). 



Suborder HyaROPHiLA. 



Limnaea stagnalis Linn. 



Nevada, various places. 



This well known Euroi^ean species, like its congener L. palustris^ 

 has a wide distribution in North America. We are indebted to Mr. 

 Bailey for specimens from the East Humboldt Eiver at Elko, Ne- 

 vada (Mus. No. 120910), also from the same stream near Battle Mountain, 

 Nevada (Mus. No. 120909). 



Linmasa palustris Miill. 



Nevada, Idaho, California, Arizona, etc. 



The exceedingly wide distribution of this form is well known. It may 

 be regarded as the parent stock from which a great number of varieties 



