174 STRONGYLOIDEA 



Cobbold, 1879, Parasites, London, 393, 399; Railliet & 

 Henry, 1909, Compt. rend. Soc. Biol., Paris, Ixvi, 170; Lane, 

 1921, Ind. Journ. Med. Res., ix, 163; Khalil, 1922, Proc. 

 Zool. Soc, London, 275. 



Fam. 3. DIAPHANOCEPHALIDAE Travassos, 1919. 



Head laterally compressed. A rudimentary leaf-crown may 

 be present or absent. Mouth-opening a dorso-ventral slit, 

 facing anteriorly or more or less inclined towards the dorsal 

 side. Walls of buccal capsule valve-like, supported by six 

 external longitudinal parenchymatous bands which terminate 

 as cephalic papillae, and by one or two transverse internal 

 ridges. A dorsal and a ventral cuticular pad present towards 

 the base of the buccal capsule. Oviparous. Parasitic in the 

 alimentary tract of Reptiles. 



1. Diaphjinocephalus Diesing, 1851. 



Head slightly constricted off from body. Margin of mouth 

 shows signs of differentiation into a leaf-crown. Valves of 

 buccal capsule supported by two transverse internal chitinoid 

 ridges, of which the posterior is V-shaped dorsally and ven- 

 trally. A pair of delicate chitinoid flanges project into the 

 buccal capsule from the ventral cuticular pad. There is a 

 dorsal hump in front of the bursa of the male. Bursa short, 

 entire. Genital cone very long, with the cloacal opening on 

 its ventral surface some distance from its tip. 



Hab. Alimentary tract of Lizards and ( ?) Snakes. 

 Genotype : D. [Stroyigylus] galeatus (Rudolphi, 1819). 



Rudolphi, 1819, Entozoorum Synopsis, 648; Diesing, 1851, 

 Systema HehnintJmm, ii, 82, 297; Molin, 1861, Mem. R. 1st. 

 Veneto, ix, 578 ; Railliet & Henry, 1909, Compt. rend. Soc. 

 Biol., Paris, Ixvi, 171 ; Baylis and Daubney, 1922, Mem. 

 Ind. Mus., vii, 331 ; Daubney, 1923, Parasitol., xv, 67 ; 

 Ortlepp, 1923, Journ. HelminthoL, i, 165. 



2. Kalicephalus Molin, 1861. 



Syn. Occipitodontus Ortlepp, 1923. 



A rudimentary leaf-crowii may be present or absent. 

 Valves of buccal capsule supported by a single internal trans- 

 verse chitinoid ridge, which is V-shaped dorsally and ventrally. 

 Oesophageal funnel may contain three small teeth. There is 

 no dorsal hump in front of the bursa of the male. Bursa well 

 developed. Genital cone relatively small, not protruding 

 beyond the margin of the bursa. An accessory piece may 

 be present or absent. Vulva in posterior half of body. 

 Uterine branches opposed or parallel. 



