1922.] H. A. Baylis and R. Daubney : Parasitic Nematodes. 275 



six, but it is impossible to determine whether the species is identical with the Ascaris 

 hexametra of Gedoelst (1916), from an African chameleon. 



Subfamily ANISAKIN^E, Railliet and Henry, 1912, emend. Baylis, 1920. 

 Genus Porrocaecum, Railliet and Henry, 1912. 

 Porrocaecum crassum (Deslongchamps, 1824). 

 One female specimen of this species was collected from a duck, at Bombay. 



Porrocaecum depressum (Zeder, 1800). 

 (Fig. 8.) 

 Examples of this species occurred in the intestine of the cinereous vulture (Vul- 

 tur monachus). The characters of the dorsal lip and of the male tail have been 

 figured by Schneider (1866). We append 



a new figure of the dorsal lip for purposes nui. 



of comparison with the next species, P. 

 angusticolle, since the differences between 

 these two species are so slight as to require 

 emphasis. /^.)ßQ J^!^r^ v V :: -^k^^*-'^ 



Porrocaecum angusticolle (Molin, i860). 

 (Figs. 9, 10.) 



The material consists of a few com- 

 plete specimens and some fragments from 

 a kite (Milvus govinda). 



This species is nearly related to the 



foregoing. The female was well described by ' 7 _ ... , 



00 ^ Fig. 8. — Porrocaecum depressum. Dorsal lip of 



von Dräsche (1883), who figured the dorsal female, viewed from exterior. 

 lip. The male has, up to the present, not d.r., dentigerous ridge; m.l , median lobe of 



been described. The principal character pulp ; P-. papilla, 

 which serves to distinguish the species from 



P. depressum is the shape of the pulp of the dorsal lip. In P. angusticolle the dorsal 

 lip is almost hexagonal in outline. The main mass of the pulp resolves itself into 

 two principal lobes, rounded anteriorly and joined by a saddle. Springing from the 

 inner surfaces of these lobes are two processes which become visible anteriorly as two 

 projecting plates, flattened and expanded distally. Towards the base of the lip there 

 is on either side a cuticular band (fig. 9, c.) which stands out somewhat prominently. 

 There is the usual pair of papillae on the dorsal lip, while a dentigerous ridge may be 

 traced round the greater portion of the lip near its edge. Small triangular interlabia 

 are present. Figs. 8 and 9 show the difference between this arrangement and that of 

 P. depressum. In the case of the latter each of the main lobes divides anteriorly into 

 two more or less finger-like processes, as described by Schneider, while internally 

 there is a large, median lobe, rounded anteriorly, which is distinctly visible where it 

 projects beyond the saddle joining the two main lobes. 



