1922] NATURAL SCIENCES OF PHILADELPHIA 79 



ceedings Academy Natural Sciences Philadelphia, 1918, p. 139-140, text 

 fig. 1, 1918. (S. icolcottiana referred to Micrarionta). 



:21. Land shells from Palm Canyon, California, and the Grand Canyon. 

 Nautilus, vol. 35, p. 48, October, 1921. (Contains brief habit note on 

 Micrarionta wolcottiana) . 

 Steakns, R. E. C. 



79. Remarks on fossil shells from the Colorado Desert. American 

 Naturalist, vol. 13, p. 141-154, 12 figs., March, 1879. 



'82. On the history and distribution of the fresh- water mussels and the 

 identity of certain alleged species. Proceedings California Academy Sciences, 

 p. 1-21, pi. 1-6, 1882. (Unionids of Colorado Desert dealt with on p. 4, 5, 6, 

 8, 9). ' 



'83. Description of a new hydrobiinoid gasteropod from the mountain 

 lakes of the Sierra Nevada, with remarks on allied species and the physio- 

 graphical features of said region. Proceedings Academy Natural Sciences 

 Philadelphia, 1883, p. 171-176, 1 text fig., 1883. (On p. 172-173 are some 

 remarks on the Colorado Desert Paludestrinae, especially Trijonia). 



'83a. On the shells of the Colorado Desert and the region farther east. 

 American Naturalist, vol. 17, p. 1014-1020, text fig. 1-3, October, 1883. 



'93. Report on the land and fresh-water shells collected in California 

 and Nevada by the Death Valley Expedition, including a few additional 

 species obtained by Dr. C. Hart Merriam and assistants in parts of the 

 southwestern United States. North American Fauna, no. 7, p. 269-283, 

 text fig. 1-2, May, 1893. (Deals largely with Mojave Desert and Inyo 

 County fauna, but on p. 278 notes occurrence of living Bythinella protect, 

 at Indian Springs, near Salton). 



:01. The fresh-water shells of the Colorado Desert, their distribution, 

 environment, and variation. Proceedings United States National Museum, 

 vol. 24, p. 271-299, text fig. 1-9, pi. 19-24, 1901. 

 Stimpson, W. 



'65. Diagnoses of newly discovered genera of gasteropods, belonging 

 to the sub-family Hydrobiinae, of the family Rissoidae. American Journal 

 Conchology, vol. 1, p. 52-54, pi. 8, fig. 1, February, 1865. {Trijonia clathrata 

 n. sp. described from "Basin of the Colorado Desert;" "semi-fossilized.") 



'65a. Researches upon the Hydrobiinae and allied forms; chiefly made 

 upon materials in the Museum of the Smithsonian Institution. Smith- 

 sonian Miscellaneous Collections, p. 1-59, text fig. 1-29, August, 1865. 

 (Includes account of Trijonia clathrata, etc.). 

 Yates, L. G. 



'90. A new variety of Helix carpenteri from southern California, Nauti- 

 lus, vol. 4, p. 51-52, September, 1890. {Helix carpenteri, var. nov., des- 

 cribed from near Indio, but not named). 



'90a. A new variety of Helix. Nautilus, vol. 4, p. 63, October, 1890. 

 {Helix carpenteri var. indioensis nov. described from near Indio). 



