ARNOLD — THE PALEONTOLOGY AND STRATIGRAPHY OF SAN PEDRO. 359 



i88ra. Observations on Planorbis; are the Shells of Planorbis Dextral or Sinistral ? On 



Certain Aspects of Variation in American Planorbes. Proc. Acad. Nat. Set. Phila., 

 1 88 1, pp. 92-110, with 27 figures. 



i88ii5. Mya arenaria in San Francisco Bay. Am. Nat., Vol. XV, May, 1881, pp. 362-366. 



iSSif. On Helix aspersa in California, and the Geographical Distribution of Certain West 



American Land Snails, etc. Ann. N. Y. Acad. Set., Vol. II, i88r, pp. 129-139. 



1882a. Verification of the Habitat of Conrad's Mytilus bifurcatus. Proc. Acad. Nat. Set. 



Phila., 1882, pp. 241-242. 



1882^. On the History and Distribution of the Fresh-Water Mussels and the Identity of 



Certain Alleged Species. Proc. Cal. Acad. Set., November 20, 1882, 21 pages and 

 figures. 



1883a. On the Shells of the Colorado Desert and the Region Farther East; Part I. The 



Physas of Indio; Part II. Anodonta californiensis in a New Locality. Am. Nat., 

 Vol. XVII, Part 2, October, 1883, pp. 1014-1020. 



Read before the Califoruift Academy of Scieuces, June 5, 1SS3. 



i883<5. The Edible Clams of the Pacific Coast, and a Proposed Method of Transplanting 



Them to the Atlantic Coast. Bn/t. U. S. Fish Com., Vol. Ill, 1883, pp. 353-362, 

 with several figures. 



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



1883^. Description of a New Hydrobinoid Gasteropod from the Mountain Lakes of 



Nevada, with Remarks on Allied Species and the Physiographical Features of Said 

 Region. Proc. Phil. Acad. Nat. Set. Phila., 1883, pp. 171-176, with figures. 



1883a'. Fresh-Water Pearl Mussels. Mining and Scientific Press, San Francisco, April 7, 



1883. 



1885a. The Giant Clams of Puget Sound. Forest and Stream, May 28, 1885. 



Read at the Washington, D. C, meeting of the American Fisheries Society, April, 1S65. 



1885^5. 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. Sur., No. 18, 1885, pp. 14-18, 

 PI. III. 



1886. The Teredo, or Ship-worm. Am. A'a/., February, 1886, pp. 131-136, with figures. 



From letter to Prof. Spencer F. Baird, Society Smithsonian Institution. 



1887. Ethno-Conchology — a Study of Primitive Money. Rept. U. S. Nat. Mus., 



1887, pp. 297-334, Pis. I-IX, and numerous text-figures. 



i8S9a. Helix (Stenotrema) hirsuta Say on the West Coast. Nautilus, Vol. — , November, 



1889, pp.—. 



1889^. Notice and Comments on the Distribution of Planorbis (Helisoma) bicarinatus Say. 



J Vest American Scientist, September, 1889. 



1890a. Descriptions of New West American Land, Fresh-Water and Marine Shells, etc. 



Scientific Results of Explorations by the U. S. Fish Commission Steamer "Albatross." 

 Proc. U. S. Nat. Mus., Vol. XIII, 1890, Pis. XV-XVII, pp. 205-225. 



1890^. On the Nishinom Game of " Ha " and the Boston Game of "Props." Am. 



Anthropologist, October, 1890, pp. 353-358, with figures. 



1891a. ^List of American Land and Fresh-water Shells Received from the U. S. Depart- 



ment of Agriculture, etc. Proc. U. S. Nat. Mus., Vol. XIV, iSgi, pp. 95-106. 



