THE OPALINID CILIATE IXFUSORIANS. 401 



*B. cognatus Say, No. 37969, 84 ram. long; Albuquerque, New Mexico; June 1, 

 1907 ; very many Opalma discophrya. 



*No. 35629, 63 mm. long ; Phoenix, Arizona ; M. C. Dickerson ; many Zcl- 



lenella hirsnta and some Opalina discophrya. 

 *No. 37138, 57 mm. long; Fort Mohave, Arizona; March 19, 1904; C, W. 



Adams ; Zell&iclla hirsuta. 

 No. 19416, 76 mm. long ; Texas-Mexico boundary ; E. A. Mearns ; no O^a- 



liuids. 

 No. 21070, 82 mm. long ; Arizona ; July 1, 1913 ; E. A. Mearns ; no Opalinids. 

 *B. compactilis Wiegmann, No. 26460, 71 mm. long; Texas; very many Opalina 

 gigantea. 



No. 20459, same label, female with eggs; same label; no Opalinids. 



*No. 4964, 2 specimens, each 76 mm. long; Pecos River, Texas; Captain 



Pope ; one was uninfected, the other bore many Opalina. spiralis. 

 *No. 38060, 71 mm. long ; female with eggs 1 mm. in diameter ; Prescott, 

 Arizona ; July 6, 1907 ; J. Hurter ; Balantidium and myriads of Opalina 

 spiralis. 

 No. 48606, Victoria, Texas ; no Opalinids. 



No. 20877, 89 mm. long ; Port Clark, Texas ; E. A Mearns ; no Opalinids. 

 No. 38356, 82 mm. long ; female with eggs 1 mm. in diameter ; San Antonio, 

 Texas ; May 24, 1908 ; J. Hurter ; no Opalinids, a few Nyctotherus. 

 *B. coniferus Cope, No. 29976, 39 mm. long; Costa Rica; Burgdorf and Scliild; 

 a few Zelleriela opisthocarya. 



*No. 20703, Nicaragua; October 24, 1892; C. W. Richmond; 2 individuals 



of Zellericlla opisthocarya. 

 *No. 14194, 51 mm. long ; Nicaragua ; August 7, 1885 ; J. F. Bransford ; 



1 individual of Zelleriella opisthocarya. 



No. 14195, same label ; no Opalinidae, 1 individual of Balantidium. 

 No. 14188, 2 specimens, each 64 mm. long ; same label ; no Opalinids. 

 Nos. 14197, 14198, 51 and 38 mm. long, Nicaragua ; August 28, 1892 ; C. W. 

 Richmond ; no Opalinids. 

 *jS. copei Yarrow and Henshaw, No. 5388, 5 specimens, 38 to 51 mm. long; 

 East Hudson Bay ; C. Drexler ; all but one infected with Opalina discophrya. 



* No. 5372, 2 specimens, 45 and 64 mm. long ; " South of High Land, On- 

 tario " ; C. Di-exler ; the larger had a very few Opalina discophrya. 



* No. 5376, 20 mm. long ; Selkirk Settlement ; Donald Gunn ; a few Opalina 



discophrya and a few very interesting, elongated, slender Balantidium. 

 No. 5376, 57 mm. long, same label ; no Opalinids. 



* No. 5367, 62 ram. long ; Moose River, " British America " ; C. Drexler ; 



2 individuals of a flat species of Opalina different from 0. discophrya 

 were seen but not studied. 



No. 5367, another specimen, 62 ram. long ; same label ; no Opalinids. 

 B. criientatus Tschudi, No. 43208, 51 mm. long; Java; 5,500 feet altitude; 



August, 1909 ; Bryant exiDedition ; no Opalinids, many Balantidium. 

 *B. debilis Girard, No. 19418, 39 mm. long; Texas-Mexico boundary; E. A. 

 Mearns ; a very few cysts of some species of Opalinidae. 



Nos. 19422, 19425, 32 and 30 mm. long ; same label ; no Opalinids. 



No. 2623, 39 mm. long; Chihuahua, Mexico; J. H. Clark; no Opalinids. 



No. 2624, 45 mm. long ; female with eggs, Delaware Creek, western Texas, 



no Opalinids. 

 No. 22389, 45 mm. long, female with eggs, San Antonio, Texas, H. H. and 



C. S. Brimley, no Opalinids. 

 No. 2619, 25 mm. long, Brazos River, Texas, Schuniard, no Opalinids. 



