1 



On the Nematode Genus Tanqun, R. Blanchard. 223 



bristles of both ninth and tentli segments long ; a dor.^al 

 series of minor setje on 9 and a dorsal pair on 10 ; the latter 

 segment divided above. 



Type. Hope Department of Zoology, University Museum, 

 Oxford. 



Ilah. N. Queensland, Brandon ; on a composite Hower 

 {7neUanthus sp.), 16. x. 14 (i?. Kelhj). 



Near P. glancus, Bagn. (a South-African species), from 

 which it may be separated, apart from coloration, by the 

 fewer setfie on veins of fore-wings and the chajtotaxy of the 

 apical abdominal segments. 



XIX. — The Nematode, Genus Tanqiia, R. Blanchard. 

 By H. A. Baylis, B.A. 



(Published by permission of the Trustees of the British Museum.) 



Up to the present time only a single species of this remark- 

 able genus appears to have been recognized, viz. the interesting 

 form Tanqua ^iara (v. Linst.). This is a nematode of medium 

 size, somewliat resembling an Ascaris in general build, and 

 inhabiting the stomach and intestines of reptiles of more or 

 less aquatic habits. It was first recorded, under the name 

 of Ascaris tiara, by von Linstow (1879), from ''Varanus 

 ornatus^^ (? V. alhigidaris*) in Natal. The otlier hosts and 

 localities from which it has been recorded in publisiied papers 

 are : — Varanus salvator, Sumatra (Parona, 189b) ; V. gouldii, 

 Australia or New Guinea — precise locality unknown (Parona, 

 1898) ; T'. hengalensis, Ceylon (von Linstow, 1904) ; and 



V. nilottcuft. White Nile (Leiper, 1908). Leiper also men- 

 tions the occurrence of a very similar form in Ilydrosaurus 

 hivittalus from the Federated Malay States. 



I have now to add that I have examined specimens, which 

 I believe to belong to this species, (1) from a lizard (probably 



Varanus niloticus, though I have no information regarding 

 its determination), from Accra, Gold Coast Colony ; (2) from 



Tropidonotus qxi'ncunciatus (7\ asperrimus, Blgr.f), from 



Ceylon ; and (3) from Varanus e.ranthemati'cus, Northern 



* Dr. G. A. Boulenf^er informs me that V. alhigidaris is the form most 

 uearly related to V. orvntus, occurring in Natal. 



t J)r. lioulenger regards the Ceylon form of T. (/td/icuncialus as a 

 di.stiuct species. 



