Volwne II. June, l8gg. Ninnber 5. 



ZOOLOGICAL BULLETIN. 



A MALE ERPETOCYPRIS BARBATUS FORBES. 



C. II. TURNER. 



The genus Erpetocypris, which was established by Messrs. 

 Brady and Norman ^ in 1889, includes certain members of the 

 old genus Cypris, which, owing to the fact that the nata- 

 tory setae of the second antenna are non-plumose and do not 

 reach beyond the tips of the terminal claws, do not swim but 

 creep. Although females of about a dozen species of Erpeto- 

 cypris are known, yet, to the best of my knowledge, no males 

 of this genus have been either described or figured. 



Recently, through the kindness of Mr. R. B. Randolph, of 

 Seattle, Wash., I received a few specimens of Erpctocypris 

 barbatits Forbes, which the donor had collected from a pond 

 on the trunda near St. Michael, Alaska. This Erpctocypris, 

 which was first described by Prof. S. A. Forbes ^ in 1893, 

 is the largest American Ostracod known to science. Professor 

 Forbes discovered it in Yellowstone Park, Wyoming ; it has now 

 been found by Mr. R. B. Randolph in the Yukon Valley, Alaska. 

 Apparently all of Professor Forbes's specimens were females ; 

 the majority of those sent me by Mr. Randolph were males. 



The shell of the male resembles that of the female both in 

 shape and size; the male being 4.07 mm. long and 2.10 mm. 



^ Brady and Norman, " A Monograph on the Marine and Freshwater Ostra- 

 coda of the North Atlantic and of Northwestern Europe. Section I, Podocopa," 

 Sci. Trans, of the Roy. Dublin Sac. Vol. v (ser. ii), 1889. 



- Forbes, S. A., " A Preliminary Report on the Aquatic Invertebrate Fauna of 

 Yellowstone National Park, Wyoming, and of the Flathead Region of Montana," 

 Bull. U. S. Fish Com. for i8gi, i8gj, pp. 244-246; PI. XXXVII, Figs. 3, 4; PL 

 XXXVIII, Figs. 5-8. 



