6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 56 



38. Observations on Planorbis ; are the Shells of Planorbis dextral or sin- 

 istral ? On certain aspects of Variation in American Planorbes. — Proc. Acad. 

 Nat. Sci., Philadelphia, 1881, pp. 92-110, with 27 figures. 



39. Mya arenaria in San Francisco Bay. — Amer. Naturalist, Vol. 15, May, 

 1881, pp. z^'^'-Z^^- 



40. On Helix aspersa in California, and the Geographical distribution of 

 certain West American Land-snails, etc. — Annals New York Acad. Sci., Vol. 

 2, 1881, pp. 129-139. 



41. Verification of the Habitat of Conrad's Mytilus bifurcatus. — Proc. 

 Acad. Nat. Sci., Philadelphia, 1882, pp. 241-242. 



42. On the History and Distribution of the Fresh- Water Mussels and the 

 Identity of certain alleged Species. — Proc. California Acad. Sci., November 

 20, 1882, 21 pp., and figures. 



Specially devoted to the Anodons of the Pacific States. Only the separates of this 

 paper were published. 



43. On the Shells of the Colorado Desert and the region farther East ; 

 Part I. The Physas of Indio; Part 2. Anodonta californiensis in a new 

 locality.— Amer. Naturalist, Vol. 17, Part 2, October, 1883, pp. 1014-1020, 

 several figures. 



Read before the California Acad, of Sci., June 5, 1S83. 



44. The Edible Clams of the Pacific Coast, and a proposed method of 

 transplanting them to the Atlantic Coast. — Bull. U. S. Fish Com., Vol. 3, 

 1883, pp. 353-362, with several figures. 



Letter to Prof. Spencer F. Baird, U. S. Fish Commissioner, October 14, 1882. Gly- 

 cimeris generosa, Sa.vidomus nuttallii and Schisothoerus nuttallii, specially mentioned. 



45. Description of a New Hydrobiinoid gasteropod, Pyrgula Nevadensis, 

 from the Mountain Lakes of Nevada, with remarks on allied species and the 

 Physiographic features of said region.^ — Proc. Acad. Nat. Sci., Philadelphia, 

 1883, pp. 171-176, with figures. 



46. Fresh-Water Pearl-mussels. — Mining and Scientific Press, San Fran- 

 cisco, April 7, 1883; Pacific Rural Press, April 14, 1883. 



47. The Giant Clams of Puget Sound, Glycimeris generosa or gcoduck. — 

 Forest and Stream, May 28, 1885. 



Read at the Washington, D. C, meeting of the American Fisheries Society, April, 1885, 

 and published in the report of said meeting. 



48. The Helicidae of the John Day Fauna. Contained in Dr. Charles A. 

 White's paper, " On Marine Eocene, Fresh-Water Miocene, and other Fossil 

 Mollusca of Western North America." — Bull. U. S. Geol. Surv., No. 18, 

 1885, pp. 14-18, pi. 3. 



49. The Teredo, or Ship-worm. — Amer. Naturalist, February, 1886, pp. 

 132-136, with figures. 



From letter to Prof. Spencer F. Baird, Secretary of the Smithsonian Institution. 



50. A Mammoth Land Snail. — Nautilus, Vol. 3, No. 3, p. 29, Philadelphia, 

 July, 1889. 



51. Notes on Physa triticea of Lea; its relations, and comments on the 

 Variation, etc., of P/i3'.ya^.— Nautilus, Vol. 3, No. 5, pp. 49-51, Philadelphia, 

 September, i88q. 



