NO. 2131. 



NEMATODE PARASITES OF RODENTS— HALL. 



35 



aperture is terminal. Penis sheath is provided Avith fine bristly 

 spines. 



Female length ( ? ) , thickness ( ? ) . Body thickens only moderately 

 posteriorly, and diminishes in size toward the terminal anal aperture. 

 Posterior end obliquely truncate. The round, inconspicuous vulva 

 (fig. 41) is situated laterally and posterior of the union of the 

 esophagus and intestine. The thick-shelled eggs are barrel-shaped, 

 with the usual opercular plugs, and are 48 \t. long and 

 19 y, thick. 



Host. — Mvs musculus. 



Location. — Esophagus. 



Locality. — Not given. 



The location given is quite unusual. 



CAPILLARIA ANNULOSA (Dujardin, 1845) Hall, 1916. 



Synonyms. — C alodium annulosum Dujardin, 1845; 

 Trichosomum annulosum Dujardin, 1845; Trichosoma 

 muris-decumani Bellingham, 1845, of Molin, 18616; 

 TrichosomuTn (Calodium) annulosum Diesing, 1851; 

 Trichosoma anulosum Dujardin of Stossich, 1890. 



/Specific diagnosis. — Capillaria (p. 33) : Body dis- 

 tinctly annulate, especially in the posterior portion. 

 Head very narrow, about 8 [;. in diameter. Cuticle dis- 

 tinctly striate transversely; striations at intervals of 2 

 to 5 [JL, the narrower intervals in the anterior portion. 

 No bacillary bands. 



Male 14 mm. long by 40 [x thick. Body somewhat 

 bent posteriorly. Tail bilobed, with two slightly 

 prominent membranous (?) alae. Spicule 950 [x long; 

 sheath of equal length, smooth and with regular trans- 

 verse folds on the interior. 



Female 21 mm. long by 58 [x thick. Tail ol^tuse. 

 Anal aperture subterminal. Vulva (fig. 42) a trans- 

 verse cleft without appendix, 4 mm. from the anterior 

 extremity, and posterior of the union of the esophagus || I 

 and intestine. Eggs 51 to 57 pL long. Body slightly pj^ 4i._capilla.- 

 thicker posteriorly than anteriorl3^ kl^ bacillata. 



Host. — Epimys norvegicus {Mus decumanus), Epi- q^q^ qj. vulva. 

 7nys rattus (Mus rattus). enlarged, af, 



Location. — Intestine. ises. 



Localities. — France (Rennes) ; Ireland. 



The writer has followed Dujardin, who proposed this species, in 

 stating that there are no bacillary bands in this species. It must be 

 noted, however, that Eberth (1863), presumably on the study of ma- 

 terial which he believed to be Dujardin's species, states that this 

 form has lateral bacillary bands equal to a third of the body diameter 



