THE OPALINID CILIATE INFUSOEIANS. 393 



* S. 'bomhif7-ons Cope, No. 14554, 51 mm. long ; Black Foot Fork, Idaho ; Hayden ; 

 many Protoopalina scaphiopodos. 



*No. 22265, 38 mm. long; Los Auimas, Colorado; July 18, 1892; A. K. 



Fisher ; very many Protoopalina scaphiopodos. 

 No. 20963. 54 mm. long; Helena, Montana; J. A. Eslik ; no Opalinids. 

 No. 3S052, 51 mm. long ; Albuquerque, New Mexico ; May 31, 1907 ; J. Hurter ; 

 no Opalinids. 

 ♦S. couchii Baird, No. 16329, 2 specimens, 41 and 60 mm. long; Helotes, Texas; 

 November 30, 1SS3; G. W. Marnock ; both sparsely infected with Zelleriella 

 cotichii. 



No. 52299, Brownsville, Texas ; R. T. Camp ; no Opalinids. 



No. 21706, Waco, Texas; May 14, 1894; H. H. and C. S. Brimley ; no 



Opalinids. 

 Nos. 38359, 38360, 54 and 57 mm. long ; Cameron County, Texas ; May 15, 

 1908; J. Hurter. The larger specimen was a female which had recently 

 discharged eggs; no Opalinids. 

 No. 12650, 3 specimens, 32 and 51 mm. long; La Paz, California; L. Belding; 

 no Opalinids (poorly preserved). 

 S. dugesi Brocchi, 16203 to 16207, 5 specimens; 38 to 51 mm. long; Guana- 

 juato, Mexico; A. Duges; no Opalinids (poorly preserved, soft). 



* S". hammoHdU Baird, No. 36365, 64 mm. long; female with eggs 1 mm. in 

 diameter; Beaver City, Utah; May 24, 1905; G. P. Engelhardt; abundant 

 ProtoopaUna hammondii. 



* No. 9915, 45 mm. long ; Guanajuato, Mexico ; 1877 ; Duges, many Proto- 



opaUna Jiammondii. 



* No. 52157, 26 mm. long ; Wyoming ; Copper ; good infection of Protoopalina, 



hammondii. 



* No. 8327, 32 mm. long ; Chihuahua, Mexico ; Potts ; rather few Proto- 



opalina hammondii. 



* No. 52149, 19 mm. long; Springerville, Arizona ; August, 1914 ; J. S. Ligon ; 

 a very few Protoopalina hamm,ondii. 



♦Nos. 52144, 52147, each 19 mm. long ; Springerville, Arizona ; August, 1914 ; 



J. S. Ligon ; one scant, one good, infection of Opalina oblanceolata. 

 *No. 8327, 45 mm. long; female, with eggs 1 mm. in diameter; Chihuahua, 



Mexico ; Potts ; very many Opalina oblanceolata. 

 No. 8327, 3 specimens 42 to 64 mm. long ; Chihuahua, Mexico ; Potts ; no 



Opalinids. 

 No. 18786, 45 mm. long ; Owen Lake, California ; May 18, 1881 ; Stephens ; 



no Opalinids. 

 Nos. 40211, 40212, each 45 mm. long; Rifle, California, August 15, 1907; 



M, Gary ; no Opalinids. 



* S. multiplicatus Cope, No. 14599, 32 mm. long: Mexico; September 1: Dug6s, 

 very many Protoopalina inexicana. 



* No. 14599, 32 mm. long; Mexico; September 1; Dugds, no Opalinids. 



No. 26597, 54 mm. long; Chihuahua, Mexico; July 18, 1898; H. H. and 



C. S. Brimley; no Opalinids. 

 No. 17437, 38 mm. long; Silao, northern Mexico; A. Dug§s ; no Opalinids 

 (in poor condition). 

 *iS. solitarius Holbrook, 3 living specimens, Raleigh, North Carolina; H. H. 

 and C. S. Brimley ; all infected with Opalina ohtrigonoidea. 

 Same label, one specimen uninfected. 



* A. C. Stokes reports Cepedea [ ?] flava, no locality or date. 



83103—23 26 



