NO. 2181. 



NEMATODE PARASITES OF RODENTS— HALL. 



95 



Female 4.5 mm. long and 350 fi thick. The tail is 1/5.7 of the 

 total body length and is elongate and finely pointed. The esophagus 

 is 1/7.5 of the total body length. The nerve ring is 100 fx. from the 

 anterior end of the body. The excretory pore is close behind the 

 nerve ring. The vulva separates the anterior portion of the body 

 from the posterior portion in the ratios of 2 :5 to 2 :7. The eggs are of 

 the t.ypical Oxyuris shape, flattened on one side, and are 120 ju, long 

 and 36 ju, thick. 



Larvae 420 fi long and 79 /x thick. The esophagus is 1/6.4 and the 

 tail 1/8 of the total body length. 

 Host. — Sciurus vulgaris. 



Location. — Intestine. 



Locality. — Germany (Bredlanken b. 



Insterburg) . 



Von Linstow (1906) states that the three 



males found hy him were not sexually de- 

 veloped, the spicule and testis not being 



present. He also states 



that the cuticle is 



transversely striated at 



intervals of 130 to 170 



[JL. Considering the 



length and thicloiess 



of this Avorm, it seems 



more likely that 13 to 



17 [jt- Avas intended. 

 Xon Linstow further 



notes that this species 



can not be confused 



with Oxyuris acutis- 



sima from the same 



host for several rea- 

 sons, among others, 

 that 0. acutisshna has no esophageal bull). I take it that Rudolphi's 

 allusion to a posterior swelling of the esophagus probably covers an 

 observation on the esophageal bulb. At any rate, circumstances indi- 

 cate that Kudolphi's s]3ecies Avas an Oxyuris and as such must have 

 had an esophageal bulb. 



OXYURIS PALLARYI Seurat, 1915?'. 



Specif r diagnos/s. — Oxyuris (p. 65) : Small forms, usually curved 

 in an S-shape or the shape of an interrogation mark. Cuticle trans- 

 A'ersely striated at intervals of 10 (x. Tvx'o lateral alae in the median 

 portion of the body. Excretory pore A'ery small, opening at the 

 level of the anterior end of the intestine in the female (fig. 117), and 

 a little posterior of this in the male (fig. 118) ; the pore is in commu- 



flo. 116.— oxyurk ungula. pos- 

 terior extremity of male. 

 Enlarged. After von Lin- 

 stow, 1906. 



Fig. 117.— Oxyuris pallaryi. 



Anterior extremity of 



FEMALE. ENL^VRGED. AF- 

 TER Seurat, 1915a. 



