RESKARCHHS IN HRLMINTHOLOav AND PARAvSlTOT.OGY. 233 



9. AtracHs {Ascaris) opeafura. n. s. — Bod\^ fusiform, most taper- 

 ing and subulate behind ; head rounded and tripapillate. Female 

 broader : tail long, straight, acute, without 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 ventral ly 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 narrow^er and expanded below ; intestine 

 dilated at commencement, but quickly narrowing ; rectum short. 



Length of females to 5 mm. by 0.33 mm. thick at the middle : tail 

 7 mm. long. Length of males nearly as in the former by 0.2 mm. 

 thick ; tail 0.375 mm. long. About an ounce measure of the worms 

 obtained from the intestine of an Iguana, Cychtra bacolopha, Cope, 

 from the island of New Providence. 



10. Trichoccplialus affinis, Rudolphi. — About a pint measure of 

 this worm was taken from the large intestine of a camel, Ca?nclus 

 badrianiis, which died at the Zoological Garden and was dissected 

 at the Biological department of the ITniversity, in the museum of 

 which the worms are preserved. 



11. Filaria horrida, Die.sing. — ^A dozen females and as many 

 males were taken from the body cavity of an American Cstrich, 

 Rhea americana, from the Zoological Garden, dis.sected at the Bio- 

 logical department of the University ; preserved in the museum. 



12. Filaria obhisa, Rudolphi. — Body pinkish- white, cylindrical ; 

 cephalis end rounded, .smooth : caudal end obtuse. About a dozen 

 specimens, female and male, from the abdominal cavity of the Barn 

 .Swallow. Chelidon ervthrooastcr. Obtained by Dr. B. H. Warren, 

 Chester county. 



The mouth organs consist of a pair of trilobate, elongated clavate 

 appendages. Dujardin figures them as conjoined in loops. Lengtli 

 of the organs 0.12 mm. long. Spicules of penis 0.75 mm. long. 

 Ova 0.04 mm. long, 0.032 mm. broad. 



13. Chcilospinira imcii/ipcnis. Diesing. — Spii'optcra wncini penis. 

 Molin. — Body cylindrical, nearly equally tapering at the extremities : 

 head naked. Caudal extremity of the female obtuse : of the male 

 spiral, alate ; alye longitudinally corrugated. Penis long, curved, 

 and acuminate : sheath hooked at the extremity narrowly bialate. 



Several dozen from the gizzard of the Rhea americana. Collec- 

 tion of the Biological department of the University. Females 25 to 

 32 mm. long ; males 20 mm. long. 



