1922.] H. A. Baylis and R. Daubney : Parasitic Nematodes. 331 



Superfamily DIOCTOPHYMOIDEA, Railliet 1910 {fide Travassos, 1920 [?]) 

 Family DIOCTOPHYMIDAE, Railliet, 1915. 

 Genus Eustrongylides, Jägerskiöld, 1909. 

 Eustrongylides, sp. (?) 



Two larvae taken from a prawn at Karachi by Dr. Baini Prashad, February 11, 



I9I5- 



These two specimens, which we refer tentatively to the genus, measure respec- 

 tively i2 - 5 mm. and I3'25 mm. in length and 0*26 mm. and 033 mm. in maximum 

 thickness. The head is somewhat swollen and almost globular in shape, with a 

 maximum diameter of o*2i-o , 22 mm. The mouth is situated in a large depression, 

 on the border of which there are six small papillae. The second ring of papillae 

 characteristic of the adults of Eustrongylides has not been detected. The oesophagus 

 is of enormous relative length, measuring 7*9 mm. and 8*25 mm. in the two specimens, 

 or about two-thirds of the total length. It consists of a short, narrow, muscular, 

 anterior portion, measuring 0'43~o - 45 mm. from the head-end, and a very long and 

 considerably wider, glandular, posterior portion. The tail is short (0*13-0 "15 mm.) 

 and bluntly conical, with a little cuticular button at the extremity. 



The life-history of the genus Eustrongylides and its allies is at present obscure, but it has been 

 suggested that certain immature forms found in fishes are the larvae of Eustrongylides ignotus 

 Jägerskiöld, a species occurring in various fish-eating birds. So far as we are aware, no form found in 

 an invertebrate has hitherto been assigned to the genus. 



Superfamily STRONGYLOIDEA, Weinland, 1858. 



Family STRONGYLIDAE, Baird, 1853, s.s. Lane, 1917. 



Subfamily DELETROCEPHALINAE, Raill., 1916. 



Genus Diaphanocephalus, Diesing, 1851. 



Diaphanocephalus willeyi (Linst., 1904) Railliet and Henry, 1909. 



(Fig. 66.) 



Syn. Kalicephalus willeyi Linst., 1904. 



Examples of this species collected from the banded krait (Bungarus fasciatus) 

 form part of the collection. The species was described from Coluber helena and 

 Vipera russellii by von Linstow (1904) and has since been reported from Typhlops 

 braminus by the same author (1906 b.) and from Bungarus fasciatus (1908). We have 

 followed Railliet and Henry (1909) in regarding the genus Kalicephalus, Molin, 1861, 

 as part of the genus Diaphanocephalus, Diesing, 1851. 



From the generic diagnosis of Kalicephalus given by Molin (1861) it is apparent 

 that this genus was separated from Diaphanocephalus on account of (a) the absence 

 of the dorsal hump just anterior to the male bursa, and (b) the presence of a 

 papilliform outgrowth carrying the vulva in the female. This combination of 

 characters is not constant, as a reference to the descriptions of D. ivilleyi and D. minutus 



