354 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 114 



by Ellis in the U.S. National Museum collection, fall into three 

 categories: Very small, obviously immature worms; adult but mis- 

 identified specimens; and, finally, a few slides of worms conspecific 

 with the type specimen. The juveniles are at present unidentifiable 

 with, certainty. Misidentified adults include C. mesochorea and some 

 other species which cannot be confidently identified but which are not 

 macrodonta on jaw shape. Undoubted specimens of the species are 

 listed as follows: 



Colorado: boulder county: Boulder, September 1915, Max M. Ellis 

 (USNM 17667). larimer county: Fort Collins, L. C. Bragg (USNM 17662). 

 YUMA county: Black Wolf Creek, near Beecher's Island, October 1915, 

 B. Jaffa (USNM 17664). 



In addition to these Colorado records, the specimen cited by Ellis 

 from Las Vegas, New Mexico (USNM 17661), appears to be a 

 macrodonta, but is so heavily stained that the sex organs cannot be 

 seen. There is nothing from a geogi-aphic point of view to preclude 

 the specimen being macrodonta. 



Specimens from Muldon and Agiicultural College, Mississippi, are 

 very much like Colorado material in every respect, yet I hesitate 

 to admit them to the list of macrodonta localities, at least until more 

 material from Mississippi or from mtermediate areas comes to hand. 



Canibarincola meyeri Goodnight 



Figures 67, 68 



Canibarincola meyeri Goodnight, 1942, Trans. American Microsc. Soc, vol. 61, 

 no. 3, p. 272, figs. 1-3. — Holt and Hoffman, 1959, Journ. Tennessee Acad. 

 Sci., vol. 34, p. 103. 



Type specimen. — Holotype, USNM 20597, from Cambarus bar- 

 tonii collected in Raven's Creek, near Lexmgton, Fayette County, 

 Kentucky, by Marvin C. Meyer (date unkno\^m). 



Diagnosis. — A small to moderate-sized member of the Philadel- 

 phica gi-oup characterized particularly by the (?) entire peristomium, 

 stout reniform spermiducal gland with a short slender prostate, and 

 peculiar form of the spermatheca. 



Description. — Length of holotype about 3.5 mm. Body of nor- 

 mal proportions, segmental diameter about three times the length 

 at midbody; segments iv-vi of essentially the same size; prosomites 

 elevated above level of metasomites; caudal sucker quite small, its 

 diameter less than that of head or of segment i. 



Head of moderate size, as long as first three body segments and 

 slightly wider than segment i. Peristomium set off by a basal con- 

 striction, slightly flared but the margin entire except for being divided 

 into a dorsal and ventral half; no evidence of lobes visible. 



