RESEARCHES IN HELMINTHOLOGY ANi:) PARASITOLOGY. II3 



riorly i-iothline, posteriori}- 2-5thsline. Head i-4 line long, i-ioth 

 line wide. Generative aperture lateral. 



Obtained by Mr. Noah Kollar from tlie intestine of Boleosoma 

 olmstcdi. 



Acanthorhynchus Repta)is, Diesing. Obtained from the drum-fish, 

 Pogonias chromis. Smallest individuals, from i-4th to i inch long 

 by Y^ line broad, were contained in cysts, adhering to the intes- 

 tines, in the peritoneal cavit}-. One 3 inches long, with the head 2 

 lines long, was found in the liver. The largest ones were coiled up 

 in oval masses, imbedded among the muscles of the tail. Two 

 masses measured each about three inches long by 10 lines in diam- 

 eter. The worm was several feet in length by 1^3 to 2 lines thick, 

 white and soft. Head oval % inch long by i-4th wide. Tail end 

 obtuse. 



Filaria Solitaria, Leidy. Syn. of Entozoa, Pr. A. N. S., viii. 56. 



Agamo7ienia Papilligeriim f Diesing, Leidy. Ibid., 55. 



Filaria Ouadrituberculata, L,eid3\ Ibid., 56. In error, described 

 posteriorly foremost. 



Filaria nitida, Leidy. Ibid., 56. Probably the young. Body 

 cylindrical, slightly narrowed towards the extremities, rose-red in 

 color. Head sub-acute ; mouth with two series of four or six minute, 

 conical pointed papillae. Caudal extremity obtuse ; anus terminal, 

 transverse, elliptical, bordered b}^ a prominent lip. Length up to 6 

 inches ; breadth to '2 a line. 



A not unfrequent position for this worm, of full size, is beneath 

 the skin of the back of Rana pipicns. Found also in the peritoneum 

 and abdominal muscles of Chcloniira scrpeyitina , not unfrequenth' in 

 the muscles of the eel, Mura^ia niacrocephala, of the Delaw^are river. 

 In the peritoneum of Eviys serrala and Esox reticulatus. 



Oesophagus Tortuous; white, one-sixth the length of the bod}- ; in- 

 testine straight or slightly tortuous, translucent. 



This parasite is most frequently found during the winter and 

 spring. It is generally bright rose-red in color, with the extrem- 

 ities tinged more deeply red. 



Filaria Spirocauda, Leidy. Body long, filiform, most narrowed 

 posteriorly, head obtuse, unarmed ; mouth a minute circular pore, 

 neither armed nor labiated. Tail short, conical, rather obtuse, sub- 

 acute ; anus just above the tail. Caudal extremity of female re- 

 curved ; of male, wound into a spiral of three or four turns. Length 

 of female 6 to 8 inches ; breadth i-3d of a line. Length of male 4 

 inches ; breadth i-5th of a line. Seven females and four males 



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