24 



PROCEEDINGS OF TEE NATIONAL MUSEUM. 



VOL. 50. 



statement would lead one to suppose that the body terminated in two 

 lobes as in Tr. fossor, but von Linstow's jfigure does not bear out 

 this idea.) 



Female 52.1 mm. long with a maximum thickness of 

 1.03 mm. Eatio of length of anterior esophageal por- 

 tion of body to length of posterior portion is 10 :G. 

 Eggs G2 IX long and 25 ^ wide. 



Host. — Hystrix cristata. 



Location. — Intestine. 



Locality. — Not given. 



This species was described by von Linstow from the 

 Zoological Museum at Koenigsberg. Diesing lists 

 Trickurls ovis from this same host, Hystrix cristata^ 

 and von Linstow notes that such a record does not seem 

 plausible. 



TRICHURIS LEPORIS (Froelich, 1789) Hall, 1916. 



Synonyms. — Trichocephalus leporis Froelich, 1789 ; 

 Mastigodes leporis (Froelich, 1789) Zeder, 1803; 

 Trichocephalus unguiculatus Rudolphi, 1809. 



SpecifiG diagnosis. — Trichuris (p. 20) : Bacillary 

 band (fig. 22) about four-fifths of body diameter and 

 extending to below the vagina. Head 17 to 20 pi diame- 

 ter. Transverse striations of cuticle at intervals of 

 about 4 to 5 [i. On each side of bacillary band an area 

 of delicate cuticular plaques (fig. 23). 



Male 29 to 32 mm. long, with a maximum diameter of 

 about 430 [;.. Body white. Ratio of length of anterior 

 esophageal portion of body to 

 length of posterior portion of 

 body is 3:2. Length of esopha- 

 geal tube from mouth to anterior 

 end of esophageal cell chain about 

 825 [X. Esophageal cell chain be- 

 gins as two or three simple long 

 cells, with not very prominent 

 nuclei, and continues posteriorly 

 as long cells with numerous con- 

 strictions along their length, giv 

 ing the appearance of numerous 

 small discoidal cells with oc- 

 casional nuclei. Spicule of vari- 

 able length, 1.87 to 7 mm. long, 

 and with a diameter of about 80 

 p near the proximal end, thinning to about 8 [x near the distal end. 

 The sheath (fig. 24) is very narrow and diaphanous, attaining a 



riG. 22.— Tkichuris leporis. 

 Cross-section of the esoph- 

 ageal PORTION OF THE BODY, 



showing the prominent 

 ventral bacillary band and 

 the relation of the esopha- 

 geal tube to the cell body. 

 Enlarged. After Eberth, 

 1863. 



Fig. 23.— Tri- 

 chx7ris lepo- 

 RIS. Anterior 

 extremity of 

 body,suowinq 

 cuticular 

 PLAQUES. En- 

 larged. Af- 

 ter Schnei- 

 der, 1866. 



