414 BULLETIN 120, UNITED STATES NATIONAL MUSEUM. 



*Nos. 38552, 38553, 43 and 45 mm. long; Huron County, Michigan; A. G. 



Ruthven ; many Cepedea cantabrigensis. 

 No. 38551 ; 48 mm. long ; same label ; no Opalinids. 

 *R. cantabrigensis latiremis (Cope), Nos. 15487, 15488, 43 and 49 mm. long; 

 females with eggs ; Fort Cosmos, northern Alaska ; .Tune, 1898 ; P. H. Howe, 

 jr. ; Cepedea cantabrigensis. 



* No. 33104, Nulato, Alaska ; May, 1878, Nelson ; a few Cepedea cantabrig- 

 ensis. 

 No. 13727, 51 mm. long; female with very immature eggs; Lake AUoknagik, 



Alaska, June, 1898; C. C. McKay; many Cepedea cantabrigensis. 

 *No. 5924, 3 specimens, 39 and 42 mm. long; Fort Resolution, Great 



Slave Lake, Northwest Territory, Canada ; R. Kennicott ; one uninfected. 



two with Cepedea cantabrigensis, one having also Balantidiiim. 

 No. 6505, 40 mm. long; Big. Island, Great Slave Lake, Northwest Territory, 



Canada, June, 1898 ; John Reid ; no Opalinids. 

 No. 6919, 32 mm. long ; Fort Resolution, Great Slave Lake, Northwest Terri- 

 tory, Canada; no Opalinids (too .soft). 

 *R. catesbeiana Shaw, in 2 specimens out of 15 imported from the Hawaiian 

 Islands (introduced) the author found Cepedea dimidiata haicaiiensis. 



Eleven bullfrogs from Maryland weie uninfected. 



Seventeen young bullfrogs ffom Wood's Hole, Massachusetts, July and 

 August, 1919, were uninfected, also three large tadpoles. 



Five bullfrogs from Raleigh, North Carolina, April, 1915, H. H. and C. S. 

 Brimley ; no Opalinids. One had Discophrya. 



Thirteen bullfrogs from the collections of the United States National 

 Museum showed no Opalinids. These were as follows : 

 No. 3331, 76 mm. long; Sibley Lake,.Kan.sas ; Governor Stevens. 

 No. 9475, 115 mm. long ; St. .Johns River, Florida ; 1874 ; G. B. Goode. 

 No. 3690, 113 mm. long; western Missouri; R. P. Hoy. 

 No. 3332, 146 mm. long; St. Louis, Missouri; Lieutenant Bryan. 

 No. 3687, 145 mm. long; Mobile, Alabama; Pilichody. 

 No. 15986, 95 mm. long ; Neuse River, Raleigh, North Carolina ; summer 



1888; D. S. Jordan. 

 No. 15984, 80 mm. long; Little River, Goldsborough, North Carolina ; United 



State Fish Commission. 

 No. 3514, 55 mm. long; Racine, Wisconsin; S. F. Baird. 

 No. 8346, 40 mm. long; tadpoles; Milner. 

 No. 17715, 43 mm. long; tadpoles and hind legs; New Braunfels, Texas, 



December 3, 1891 ; Evermann. 

 No. 28376, 37 mm. long ; Maxey, Tennessee, October 11 ; G. D. Morgan. 

 No. 3510, SO mm. long ; St. Lopis, Missouri ; D. G. Engelmann. 

 No. 3336, 105 mm. long; near Shawnee Village, Arkansas River, near Fort 



Smith ; H. B. Mollhausen. 

 * R. chrysoprasina (Cope), No. 14180, 2 .specimens, 23 and 26 mm. long; 

 Nicaragua ; August 7, 1885 ; J. P. Bransford ; Cepedea occidentalis. 



No. 14180, another specimen, 26 mm. long ; same label ; no Opalinids. 

 No. 30653, 38 mm. long; Uren, Costa Ricao ; 2,000 feet altitude; W. M. 



Gabb ; no Opalinids. 

 R. clamitans Latreille. In 24 specimens from Raleigh, North Carolina, the 

 author found no Opalinids; most contained flagellates. 

 In nine specimens, listed below, from the United States National Museum 



no Opalinids were found : 



