THE OPALINID CILIATE INFUSORIANS. 419 



*No. 3413, 90 mill, loug; Port Huron, Michigan; S. F. Baird ; Opalina 



ohtriffonoiiJea. 

 *No. 9257, 2 specimens, 54 and 45 mm. long; Washington, District of Co- 

 lumbia; June 10, 3877; T. H. Bean; the smaller was uninfected, the 

 larger contained a few Opalina obtrigonoidea. 

 No. 33238, 35 mm. long; Lake Maxinkuckee, Indiana; July 8, 1899; United 



States Fish Commission; no Opalinids (formalin?). 

 No. 25146, 65 mm. long; Arlington, Virginia; April 8, 1898; William Palmer; 



no Opalinids. 

 No. 11476, 60 mm. long; female with eggs; labeled Rana halecina hyhridea; 

 Waukegan, Illinois; James Millner; no Opalinids. 

 *R. pipicns austricola (Cope), No. 6506, 2 specimens, 38 and 55 mm. long; 

 Tobasco, Mexico; "in wells"; March, 1864; Dr. Berendt ; Opalina ohtrifjo- 

 voidea austricola. 



*No. 24809, 42 mm. long; Guatemala; H. Hogue; a few Opalina obtrigo- 

 noidea austricola. 

 No. 28405, 65 mm. long ; same label ; no Opalinids. 

 *No. 30554, 27 mm. long ; Pico Blanco, Costa Rica ; W. M. Gabb ; many 



Opalina obtrigona austricola. 

 No. 30555. 25 mm. long ; same label ; no Opalinids. 

 *R. pipiens sphenocephala (Cope), No. 29003, 83 mm. long; Kissimee Prairie, 

 Florida : April 22, 1901 ; E. A. Mearns ; very many Opalima carol inenrSis. 

 No. 29004, 91 mm. long; female in ovulation; same label; no Opalinids. 

 *Eight specimens from Raleigh. North Carolina ; April, 1915 : H. H. and C. S. 

 Brimley ; six uninfected, two abundantly infected with Oixilina carol- 

 inensis. 

 *No. 3425, 58 mm. long; fema'e with eggs; Charleston, South Carolina; C. 



Girard ; many Opalina carolinensis. 

 No. 3425, another specimen. 45 mm. long; same label ; no Opalinids. 

 No. 5192, 60 mm. long; New Orleans, Louisiana ; St. Charles; no Opalinids. 

 No. 26313. 43 mm. long ; Lemon City. Florida ; E. J. Brown ; no Opalinids. 

 No. 3436. Tarboro. North Carolina; Bridger; no Opalinids. 

 No. 39865, 53 mm. long; locality?; no Opalinids. 

 No. 10312, 72 mm. long ; Oakley, South Carolina ; IMay, 1879 ; F. W. Haywood ; 



no Opalinids. 

 No. 2428, Pensacola, Florida ; Hammond ; no Opalinids. 

 *R. pretiosa Baird and Girard, Nos. 17587, 17588, each 72 mm. long; Elliston. 

 Montana; July 21, 1891; B. W. Evermann ; many Opalina copci. 



*No. 17603. 63 mm. long ; Deer Lodge River, Montana ; July 22, 1891 : B. W. 



Evermann ; Opalina copei. 

 No. 17617, 46 mm. long; National Park, Wyoming; August 8, 1891; B. W. 



Evermann ; no Opalinids. 

 No. 13770, Deschutes River, Washington; Bendire; no Opalinids. 

 * R. rugosa Scblegel. No. 31802. 33 mm. long; Yamoto River. Nara, Japan : H. M. 

 Smith ; Cepcdea pulchra japonica. 



*Nos. 31813, 31814 length 45 mm. (female in ovulation) and 35 mm.; Kori- 



yama. .Japan ; April 26 ; H. M. Smith ; Cepedea pulchra japonica. 

 No. 22190, 40 mm. long ; Japan ; Moore ; no Opalinids. 

 *R. septentrionalis Baird, No. 13622, 45 mm. long, Lucknow, Ontario, Canada, 

 1883; J. H. Gamier, a few Opalina species (?). 



No. 39792, 55 mm. long ; White Oak Lake, Deer River, Minnesota ; August 

 21, 1894 ; R. J. Woolman ; no Opalinids. 



