328 PROCEEDINGS OF THE NATIONAL MUSEUM vol. in 



Oklahoma: comanche county: Fort Sill, June 6, 1959, J. W. Berry (PCH 

 905). 



Arkansas: benton county: Wildcat Creek at Ark. H}^ 68, July 7, 1958, 

 P. C. Holt (PCH 769). CRITTENDEN COUNTY: 14.6 miles south of Marked Tree 

 on U.S. Hy. 63, July 5, 1958, Holt (PCH 758). greene county: 0.8 miles east 

 of the Lawrence County line on Ark. Hy. 25, July 5, 1958, Holt (PCH 759). 



Kansas: chautauqua county: 4.3 miles west of the Montgomery County 

 line on Kans. Hy. 166, July 8, 1958, Holt (PCH 773). lyon county: 3.5 miles 

 west of Emporia, June 2, 1944, Zirnstein (PCH 182). sumner county: 5.6 

 miles north of South Haven on U.S. Hy. 81, July 8, 1958, Holt (PCH 775). 



Illinois: champaign county: Urbana, Frank Smith (USNM 17676). Iro- 

 quois county: Wellington, September 1914, A. T. Stevens (USNM 17675). 



Michigan: cheboygan county: Douglas Lake, summer 1915, Max M. Ellis 

 (USNM 17668, paratypes, 17673, 17675). 



Minnesota: olmstead county: 5.9 miles west of Eyota on U.S. Hy. 14, 

 July 21, 1958, Holt (PCH 792). wright county: Clearwater River at Minn. 

 Hy. 152'in town of Clearwater, July 21, 1958, Holt (PCH 793). 



Wisconsin: dane county: Lake Mendota in ]\Iadison, August 28, 1949, 

 A. A. Leath (PCH 262). grant county: Blake Fork, on Wis. Hy. 35 near 

 Bloomington, May 13, 1956, Holt (PCH 900). juneau county: 17 miles south- 

 east of Mauston on U.S. Hy. 16, July 22, 1958, Holt (PCH 796). oneida 

 county: Rhinelander, October 1915, G. Hanson (USNM 17669, 5 slides). 



South Dakota: beadle county: 3.4 miles east of Wessington on U.S. Hy. 14, 

 July 19, 1958, Holt (PCH 788). 



Remarks: This widespread and often abundant species was 

 originally described in the body of a key to four species of branchi- 

 obdellids collected by Ellis in Michigan, with the indication that the 

 formal description was then in progress. The name mtrea is usually 

 cited as dating from 1919, although the earlier usage constitutes a 

 valid proposal of a new name, containing as it does considerable 

 comparative description with related forms and general indication 

 of a type locality. 



In the folio \\'ing jenr the complete description of mtrea was pub- 

 lished, including a photograph of the entire animal, drawings of the 

 jaws, and an imposing list of localities from the Middle West and 

 Great Plains areas. The species appears not to have been men- 

 tioned again in the literature until the publication of Goodnight's 

 suimnary of 1940, which merely quotes the original description with 

 its published localities, and adds 23 new localities for the species. 

 The only new and original commentary contributed is the remark 

 that "This form could be confused with Camharincola macrodonta 

 but it is easily distinguished by the difference in tooth structure as 

 outlined above." Presumably the dimension of 310 mm. cited by 

 Goodnight for the liolotype is a misprint for Ellis's original figure 

 of 3.0 mm. 



In three other short papers, Goodnight has recorded vitrea from 

 Georgia (1940b), Florida (1941), and Wyoming and Michigan (1943). 



