1890.] NATURAL SCIENCES OF PPIILADELPHIA. 411 



A female 6 inches long and a male 4 inches. 



From the Polar Bear, Ursus maritimus, of the Zoological Garden. 

 Submitted by Dr. Chapman. 



6. Asoaris simplex Rudolphi. 



Body cylindrical, tail short, conical, straight, with a minute mucro. 



One female 4 inches long by I'o mm. thick ; a multitude of 

 young, Avith no males, generally from 20 to 50 mm. long by 0"3 to 

 0"5 mm. thick. 



From the stomach of Mesoplodon sotverbiensis. Submitted by Dr. 

 Cooper Curtice, Washington. 



6. Ascaris spiculigera lUuloliihi. 



Females to 45 mm. long by 2 mm. thick ; tail short, acute. Males 

 30 mm. long by 1 mm. thick ; tail short, incurved, acute. A pair 

 of curved spicules exserted from the genital aperture. 



Numerous specimens from the stomach of Pelecanics fusciis, Flor- 

 ida. Submitted by Mr. F. C. Baker. 



8. Asoaris diacis n. s. 



Body cylindrical, spirally rolled, pinkish-white, translucent, with 

 the brown intestine shining through, smooth, about equally tapering 

 at the ends. Head without appendages; mouth trilobed, with lobes 

 large and rounded. Tail straight conical, acute, without papillae. 



A female 70 mm. long, by 1'25 mm. thick. Obtained by Dr. B. 

 H. Warren, from the body cavity, in the vicinity of the cloaca, 

 of the Purple Grackle, Quiscalns quiscala, Chester Co. Submitted 

 by Dr. Warren. 



9. Atractis (Ascaiis) opeatura n. s. 



Body fusiform, most tapering and subulate behind ; head rounded 

 and tripapillate. Female broader ; tail long, straight, acute, with- 

 out appendages ; vulva slightly tumid, situated a short distance in 

 advance of the anus. Tail of male shorter incurved, with a 

 mucronate point about one-third its length, with two pairs of tubercles 

 ventrally near the middle and a pair opposite dorsally. Genital 

 spicules curved ; one twice the length of the other. 



Oesophagus cylindrical, bounded by chitinous rods ; pharynx 

 about as long, slightly narrower and expanded below ; intestine 

 dilated at commencement but quickly narrowing; rectum short. 



Length of females to 5 mm. by "33 mm. thick at the middle ; tail 

 7 mm. long. Length of males nearly as in the former by "2 mm 

 thick ; tail "375 mm. long. About an ounce measure of the worms 



