ART. 23 NEW NEMATODE WOEMS CHANDLER 7 



tion which is thrown into rough, uneven fimbriae. (Fig. 10.) Some 

 sjiecimens are nearly entirely enclosed in this rough coat, while in 

 others there are only occasional patches of the cuticle which are pro- 

 vided with it. Mouth provided with three inconspicuous lips. 

 Esophagus short and muscular, about 250;Lt long. 



Male about 50 to 60 mm. long with a diameter of about 21(),(x, 

 uniform throughout nearly the whole length. Both ends of body 

 bluntly rounded, the tail more bluntly than the head. Cloacal aper- 

 ture only about 30/^ to 35/x, from tip of tail, the latter without alae 

 or any distinct papillae, although there is a wartlike prominence just 

 behind the cloacal opening. The spicules are short, equal, and con- 

 verging at the tip, united by a membrane for the greater part of 

 their length, and each ending in a single chitinous point. In lateral 

 view they are strongly curved, like the blade of a sickle; the proximal 

 ends, which are free, suggest the handles of a plow. They have a 

 length of about 150/x,. The gubernaculum is a single, thin, curved 

 plate of chitin, appearing splinterlike in side view and slightly cres- 

 centic in optical section as seen in a ventral view of the worm. 



Female about 80 to 90 mm. long, with a diameter, practically uni- 

 form for nearly the entire length of the body, of about 260/x. Pos- 

 terior extremity bluntly conical, the anus almost terminal, less than 

 oOju, from the tip. Vulva posterior, near anus, 130|u. to loOju. from tip 

 of tail. Uteri filled with embrj^os throughout a large part of the 

 body; uterine embryos measured about 230/1. to 280/x in length, with 

 a diameter of about 12/x, near the equator, the head bluntly rounded, 

 the tail drawn out into a fine point. 



Host. — Cehus species. 



Location . — Lungs. 



Locality. — Chicago, 111. 



Type specimens. — United States National Museum, helminthologi- 

 cal collections No, 8120; paratypes No. 8121. 



These worms were collected by Dr. W. H. Taliaferro in large num- 

 bers from the lungs of a number of specimens of South American 

 monkej^s captive in Chicago. 



According to van Thiel's description, the type species, F. asper^ 

 differs in a number of important respects from the species here de- 

 scribed, and it is possible that they may eventually have to be sepa- 

 rated into different genera. The most significant differences are in 

 the tail and spicules of the male. F. asper is described as having 

 small alae and five pairs of papillae, whereas no such structures could 

 be discerned in F. arator. The spicules of F. cupper are described as 

 separate structures, supported by two gubernacula, whereas in F. 

 arator the spicules are united into a single plowlike structure and 

 there is a single gubernaculum. The cuticle of F. asper " is covered by 

 irregularly placed conical elevations, which, in the middle of the 



