ART. 13. NEW NEMATODES FROM LAND-TOETOISE — CHAPIX. 5 



the head and body ahite. The present species comes from a huid 

 tortoise and is without alae. Whether the nematode found in 

 Testudo graecca of Europe is the same as Ascaris holoptera Rudolphi 

 is another question but the great difference in the habits of the hosts 

 would lead one to suspect a misidentification. 



Superfamily OXYUROIDEA. 



Family OXYURIDAE. 



Genus LABIDURIS Schneider. 



LABIDURIS GULOSA (Rudolphi). 



Syn. : Labidnris zschokhei Linstow. 



Many hundred specimens of a worm wliich I refer to the above 

 species were collected from the intestine (colon?) of Testudo dentic- 

 vXata. An examination of the specimens shows a great range of 

 variation in the length of the spicules, length of the acute tail and 

 position and number of the preanal papillae. In ten male speci- 

 mens selected at random, the spicules measured from 0.48 mm. to 

 0.60 mm. The acute portion of the tail may be as short as the dis- 

 tance from the opening of the cloaca to the base of the tail or more 

 than twice that length. In front of the cloaca there ma}' be as 

 many as five papillae in each of the submedian rows with either none, 

 one or two on either side of the rows. There are, however, usually 

 three papillae in each submedian row. 



The points of difference between L. gulosa (Rudolphi) as de- 

 scribed by Schneider and L. zschokhei Linstow, as brought out in 

 von Linstow's original description are (1) tail long in L. gulosa and 

 short in L. zschokhei and (2) one papillae outside of either sub- 

 median row in the former, two in the later. As these differences 

 do not appear to hold in a large series, I am placing von Linstow's 

 species in synonymy. Both species were described from Testudo 

 tahulata, which equals Testudo dentlcv.lata. 



