igo RESEARCHES IN HELMINTHOLOGV AND PARASITOLOGY. 



slightly' curved, obtuse. Genital aperture a little in advance of the 

 tail end. Penal spicules short, curved. 



Females 3 inches long, i ram. wide. Male iJ/( inches long, 0.5 

 mm. wide. 



One of each sex from beneath the skin of the head and neck of a 

 shrike, Col/urio //(dovicia?/!is. Florida. Dr. B. H. Warren. 



Filaria stigmatura. — Body filiform, nearly uniform cylindrical, 

 but attenuated at the cephalic extremity. Head rounded truncate, 

 smooth. Mouth large, bordered by two or three? minute, conical 

 papillae, unarmed within. Integument smooth throughout, not an- 

 nulate. Female : Caudal extremity straight, smooth ; tail straight 

 or slightly bent back from the distinct anal aperture, conical, blunt. 

 Male : Caudal extremity spirally enrolled two or three times, fur- 

 nished with narrow band-like grannularalse sustained by twelve pairs 

 of ribs or cylindroid papillae, of which seven pair are preanal ; tail 

 curved conical, subacute ; penal spicules, one four times the length 

 of the other. 



Length of female 40 to 55 mm. ; breadth 0.5 mm. ; tail 0.3 mm. 

 long. Length of male 24 to 30 mm. ; breadth 0.375 mm. ; tail 

 0.25 mm. from genital aperture ; long penal .spicule 0.88 mm., short 

 one 0.2 mm. Pharynx cylindrical, 0.25 mm. long; cesophagus 

 cylindrical, .slightly expanded at lower end, 3 mm. long ; intestine 

 nearly same diameter. Eggs ihick-shelled, oval, 0.04 long, 0.024 

 broad. 



A multitude of individuals obtained from the swimming bladder 

 of the lake trout, Salveliniis namayciish . Lake Superior. Dr. James 

 H. Bissell. 



The species bears considerable resemblance to Ancyracanthus cysti- 

 dlcola (Rud, Schneider, Mon. d. Nematoden, 105), from a like 

 position of Sabno fiirio of Europe, but it possesses distinct charac- 

 ters, even generic. It also resembles Filaria dentitidata (lb., 102), 

 but is devoid of the tegumentary spines and other characteristic 

 marks of that species. 



Filaria helecina, Molin. Sitzungsb. Wien. Akad. Wiss., 1858, 

 xxviii, 391. 



Filaria anhingcp, Wyman. Proc. Boston Soc. Nat. Hist., 

 1868, 100. 



Eustrongyliis, Packard. Hayden's Rep. U. S. Geol. Surv., 



1873. 735- 



Falaria Wyviani, Leidy. Proc. A. N. S., 1882, 109. 

 Numerous additional specimens from the brain of a dozen in- 

 dividuals of Plotiis anhinga. Florida. Dr. B. H. Warren. 



