MARINE MOLLUSKS FROM PANAMA COLLECTED BY 



THE ALLAN HANCOCK EXPEDITION TO THE 



GALAPAGOS ISLANDS, 1931-1932 



A. M. Strong and Leo George Hertlein 



Introduction 



During the course of an expedition to the Galapagos Islands on 

 Captain Allan Hancock's motor cruiser Velero III, the junior author 

 had the opportunity to collect marine mollusks on shore and by dredging 

 at four localities along western Panama. This occasion is taken to thank 

 Captain Hancock, whose generosity made the collection of the material 

 for this report possible. Acknowledgment is also due to Mr. Charles 

 Swett, chief officer on the Velero III, as well as members of the crew; 

 also Mr. Karl Koch and Mr. C. B. Perkins, of the Zoological Society 

 of San Diego, and Mr. John Garth of Long Beach, and other members 

 of the party who accompanied the expedition, all of whose genial co- 

 operation made collecting a pleasure. Acknowledgment is due the late 

 Mr. Herbert N. Lowe of Long Beach, California, for assistance in the 

 determination of certain of the species; also to Dr. G. Dallas Hanna 

 of the California Academy of Sciences, for criticism of the manuscript 

 and for many helpful suggestions during the course of the work. Mr. 

 Allyn G. Smith gave helpful suggestions regarding the arrangement of 

 some of the plates. The photographs illustrating the species in this paper 

 were made by Mr. Frank L. Rogers. These photographs are the result 

 of work accomplished during a government Works Progress Adminis- 

 tration project. 



Only the more important papers on Panama mollusks will be men- 

 tioned here. The first comprehensive report on the marine mollusks of 

 Panama was made by C. B. Adams^ in 1852. A few years later, Car- 



1 Adams, C. B., Catalogue of Shells collected at Panama, with Notes on 

 Synonymy, Station, and Habitat. Ann. Lyceum Nat. Hist. New York, vol. 5, 

 1852, pp. 229-548 [also unnumbered page "Concluding Remarks"]. [Also separate 

 of the same.] See also Carpenter's review of this work in the Proc. Zool. Soc. 

 London, 1863, pp. 339-369. Reprinted in Smithsonian Miscellaneous Collections, 

 No. 252, 1872, pp. 173-205. — See also, Presbrey, E. W., Collecting in Panama. 

 Nautilus, vol. 26, no. 11, 1913, pp. 121-125. 



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