204 SHELLS OF LOWEB CALIFOBNIA—STEABNS. vol.xvii. 



were incidentally obtained, or the random collections made, daring a 

 very brief stay. Some of the forms are quite rare; these, together with 

 the probability of obtaining other equally rare and desirable species, 

 and the presumption that by systematic search a very large addition 

 may be made to the number now known as occurring, offer a promising 

 return to whoever will make a thorough exploration of these islands. 



The following papers, published chiefly in the Proceedings of the U. 

 S. National Museum, will be found to contain more or less information 

 relating to the distribution of the species above recorded, as well as to 

 many others that occur on the west coast between Point Conception, 

 California, and the South American coast as far south as 7° 30' S : 



BIBLIOGRAPHY. 



Dall, Wm. H. : Preliminary report on the collection of mollnsca and brachiopida 

 obtained in 1887-'88 by the U. S. Fish Commission steamer Alhatross. 

 Froc. U. S. ^'^at. Mas., xii, pp. 219-362, pis. v-xv, 1889. (No. 773.) 

 On some new and interesting West American shells obtained from tlie dredg- 

 ings of the U. S. Fish Commission steamer Alhatross in 1888, and from 

 other sources. 



Froc. U. S. Nat. Mus., xiv, pp. 173-191, pis. v-vii, 1891. (No. 849.) 

 Land bhells of the genns Bulimnlus in Lower California, with descriptions of 

 several new species. 



Froc. U. S. Nat. Mus., xvi, pp. 639-647, 1893. (No. 958.) 

 Williamson, Mrs. M. B. : An annotated list of the shells of San Pedro Bay and 

 vicinity, with a description of two new species by Wm. H. Dall, etc. 

 Froc. U. S. Nat. Mus., xv, pp. 179-219, 1892. (No. 898.) 

 Stearns, Robt. E. C. : Descriptions of new West American laud, fresh-water, and 

 marine shells, with notes and comments. 

 Froc. U. S. Nat. Mus., xiii, pp. 205-225, 1890. (No. 813.) 

 List of North American laud and fresh-water shells received from the U. S. 

 Department of Agriculture, etc. 

 iVoc. U. S. Nat. Mils., xiv, pp. 9.5-106, 1891. (No. 844.) 

 List of shells collected on the west coast of South America, principally lietween 

 latitudes 7° 30' S. and 8° 49' N. by Dr. W. H. Jones, surgeon U. S. Navy. 

 Froc. U. S. Nat. Mus., xiv, pp. 307-335, 1891. (No. 854.) 

 Preliminary report on the molluscan species collected by the United States 

 expedition to West Africa in 1889-90. 

 Froc. U. S. Nat. Mus., xvi, pp. 317-339, 1893. (No. 940.) 

 On rare or little-known mollusks from the west coast of North and South 

 America, with descriptions of new species. 



Froc. U. S. Nat. Mus., xvi, pp. 341-352, 1893. (No. 941.) 

 Report on the mollusk fauna of the Galapagos Islands, with descriptions of 

 new species. 



Froc. U. S. Nat. Mus., xvi, pp. 353-450, 1893. (No. 942.) 

 Report on the Land and Fresh-water Shells collected in California and Nevada 

 by the Death Valley Expedition, etc., by Dr. C. Hart Merriam and assist- 

 ants, etc. 



North American Fauna, No. 7, pp. 269-283, 1893. 

 Orcutt, Charles R. : "The Colorado Desert." 



Tenth Annual Beport of the State Mineralogist of California, pp. 899-919, 

 1890. 

 Yates, Dr. L. G. : "The Mollusca of the Channel Islands of California." 



NintJi Annual Beport of the State Mineralogist of California, pp. 175-178, 

 1890. 



