6 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 119 



distinct concavity just anterior to midlength. Length of allotype 

 .360 mm.; height .240 mm. 



Type-locality and range, — Tributary to Fall Creek, 1 mile east 

 of Summer Hill Village, Cayuga County, N.Y., on Route 90 (elevation 

 1440 ft.). Fall Creek is a tributary to Cayuga Lake. Here it was 

 found on Cambarus robustus Girard in association with a species near 

 Donnaldsoncythere scalis Hobbs and Walton (1963). 



Two additional localities on Salmon Creek and Fall Creek in 

 Tompkins County, N.Y., are in the Cayuga Lake drainage. A fourth 

 locality is the Salmon River, 8 miles east of Pidaski, Oswego County, 

 N.Y., on Route 13. The Salmon River drains directly into Lake 

 Ontario. 



Types. — The holotypic male, the allotypic female, and a dissected 

 paratypic male are deposited in the U.S. National Museum (nos. 

 111255 and 111256). Paratypes are in the collections of C. W. Hart, 

 Jr., and the joint collection of the authors. 



Host. — In all the localities cited above, this ostracod was found 

 on Cambarus robustus Girard. 



Relationships. — Donnaldsoncythere cayugaensis is most closely 

 allied to D. ileata Hobbs and Walton (1963) and differs from it chiefly 

 in the bilobed ventral extention of the peniferum and in the slightly 

 more bent clasping apparatus. On the average, it is slightly larger 

 than ileata, although some specimens of the latter are longer and 

 higher than the smallest specimen of cayugaensis. 



Remarks. — The name cayugaensis refers to the presence of the 

 species in the Lake Cayuga drainage system. 



Genus Entocythere Marshall (1903) 

 Entocythere kanawhaensis, new species 



Figures ll-o 



Male. — Eye present. Shell (fig. 11) distinctly elongate, highest 

 just posterior to midlength, and with dorsal margin evenly contoured, 

 tapering gently both anteriorly and posteriorly; ventral margin 

 entire; submarginal setae present except dorsally between level of 

 eye and anus; setae mostly regularly spaced but somewhat closer 

 together posteriorly. Length of holotype .615 mm., height .300 mm.; 

 length of paratype male .600 mm, ; height .300 mm. 



Copulatory complex (figs. In, o) with posterior and ventral margins 

 of peniferum entire, the latter rounded; entire peniferum of almost 

 uniform thickness and without ornamentation. Penis small, its 

 length approximately one-fourth the anterior-posterior dimension of 

 distal portion of peniferum, and situated very dorsal to ventral ex- 

 tremity of peniferum. Dorsal finger slender with its terminal seta 



