192 KESEARCHEvS IN HELMINTHOLOGY AND PARASITOLOGY. 



Numerous additional specimens from the former two birds. Flor- 

 ida. Dr. B. H. Warren. 



Asarris tenuicollis. Rudolphi, Syst. Hel., ii, i6o. 



Numerous specimens, all females, up to i J2 inches long and 2 mm. 

 thick. From the .il/igator niississippioisis. 



Ascaris a)ioiira, Dujardin. Diesing, Syst. Hel., ii, 161. 



Numerous females 3 and 4 inches long to 2 mm. thick. These 

 were all suspended in the stomach, through double apertures of 

 the mucous membrane, and thus tightly retained in position. From 

 a snake which, from the description, is supposed to be the milk- 

 .snake, Ophibohis. Obtained by Dr. James Bissell in the vicinity of 

 Harrisburg, Pa. 



Ascaris penita. — Body cylindrical, tapering at the extremities and 

 most attenuated in front. Mouth trilabiate. Tail of female long, 

 .straight, conical, subulate; of male of .same form strongly curved, 

 with the point brought near the genital aperture ; provided at the 

 posterior third with four pair of papillae. Penal spiculae remark- 

 ably robust. 



Length of female 5 to 7 lines by )4 line in width ; of male to 5 

 lines by 0.375 mm. in width. Numerous specimens from the intes- 

 tine of Trachemys scabra. Generative aperture of the female at the 

 posterior third of the body. CEsophagus long, cylindrical, followed 

 by an oval or spherical gizzard. Commencement of intestine di- 

 lated. CEsophagus 1.75 mm. long by 0.125 wide. Gizzard about 

 0.25. Tail of female 1.25 mm. long. Breadth of penal spicules 

 0.08 mm. 



Physaloptera torquata. — Body cylindrical, most attenuated ante- 

 riorly. Head with a conspicuous narrow annular fold or color_ 

 Mouth bilabiate. Labia half conical, with a pair of lateral papillae, 

 and the apex provided with a group of four, of which one is ex- 

 ternal to the others. Tail short, conical, obtuse, recurved from the 

 anal aperture. 



Numerous specimens, all females, from 3 to 6 lines wide and i-4th 

 of a line thick. Worms all more or less spirally coiled. From the 

 .stomach of the badger, Me/cs labradorica. 



Physaloptera tiirgida, Rudolphi. Diesing, Syst. Hel., ii, 233; 

 Leidy, Pr. A. N. S., 1856, 53. 



From the stomach of the opossum, Diddphis virginiana. Collec- 

 tion of the Army Medical Mu.seum, Washington ; also received from 

 Dr. Benjamin Sharp. 



Physaloptera abbreviata, Rudolphi. Diesing, Syst. Hel., ii, 235. 



Numerous females from 3 to 8 lines and three males about 2 lines. 



