418 BULLETIN 120, UNITED STATES NATIONAL MUSEUM. 



*R. nutti Roulonser, from German East Africa; Awerinzew (1913); reports 

 Protoopolina primordialis. 



No. 39436, 38 mm. lonj,' ; Kisboslio, German East Africa ; J. Roux ; no 



Opalinids. 

 *0f nine specimens collected by The Smithsonian African Expedition, 

 on " the Mount Kenia trip," in British East Africa, October, 1909, all but 

 one were Infected. The records are as follows : 

 *No. 41434, 56 mm. long; female'with large eggs; many Protoopolina 



nutti. 

 *No. 41435, 63 mm. long; female with eggs 1^ mm. in diameter; a few 



Protoopalinn nutti. 

 *No. 41438. 51 mm. long, very many Protoopolina mitti, also Balantidium. 

 *No. 41439, 65 mm. long; female .iust after ovulation; exceedingly 



abundant Protoopalina nutti, also Nyctotherus. 

 *No. 41441, 45 mm. long, 2 specimens ; one uninfected, one showed 



many Protoopalitm nutti. 

 *No. 41444, 55 mm. long, female with a few large eggs-, 2 specimens; 



one gave a few, the other bore very many Protoopalina nutti. 

 *No. 41445. 48 mm. long, female with a few large eggs ; myriads of 

 Protoopalina nutti, also Balantidium. 

 R. onco Cope. No. 189.^9. 62 inni. long; female captured dr.ring ovulation; Vega 

 Valley, Nevada; March 18, 1891; E. W. Nelson; no Opalinids. 

 No. 189.58, ,56 mm. long ; same label ; no Opalinids. 



No. 18960, 65 mm. long; northern Mexico; March 9, 1891; E. W. Nelson; no 

 Opalinids (soft). 

 R. oxyrhynchus Sundevall, No. .57521, 35 ram. long; German East Africa; Julius 



Hurter. sr. ; no Opalinids. 

 R. paliuipcs Spix, Nos. 24811, 2481^, 75 and 44 mm. long; Guatemala ; H. Hogue; 

 no Opalinids (soft). The larger of these frogs had the wall of the caecal 

 region calcified. 

 No. 25231, 60 mm. long; Guateinala ; Van Patten; no Opalinids (soft). 

 Nos. 30329, 30331. .59 and 43 nmi. long; Tehuantepec, Mexico; F. Sumi- 

 chrast; no Opalinids (soft). 

 *R. palustris LeConte. In many living frogs from Woods Hole, Massachusetts, 

 and Oberlin. Ohio, the author has found Opnlina ohtrifjonoiden and 1*^8 form« 

 plicata. 



*Three living specimens; Raleigh. North Carolina: April, 1915; II. H. and 



C. S. Brimley ; 2 were uninfected, 1 had abundant Opalina obtrigonoidea. 



* No. 3434, 47 mm. long; West Philadelphia, Pennsylvania; W. S. Wood; 



Opalina obtrioonoidea. 

 *No. 3406, 68 mm. long ; Detroit River, Michigan ; August, 1853 ; S. F. Baird ; 



Opalin a o btrigonoidea . 

 *No. 9,388, .50 mm. long; upper Wisconsin River; Hammond; Opalina obtri- 

 gonoidea. 

 No. 3408, 03 mm long; Framingham, Massachusetts; S. F. Baird; no 



Opalinids. 

 No. 39817, ,53 mm. long; Rocky River, Olmstead Falls, Ohio; June, 1893; 



A. J. Woolman ; no Opalinids. 

 No. 3407 ; Washington County, Mississippi ; D. L. C. Wailes ; no Opalinids. 

 *R. pipiens Schreber, No. 3295, 72 mm. long ; labeled Rana utricularia ; Charco 

 Escondino; Matamoros, Tamaulipas, northeastern Mexico; March, 18,53; 

 Couch ; many Cepcdca mexicona. 

 No. 3295, 2 other specimens, 47 and 68 mm. long; same label; no Opalinids. 

 *In numerous frogs from Oberlin. Ohio, Raleigh, North Carolina, and Chi- 

 cago. Illinois, the author has found Opalina obtrigonoidea. 



