102 SPOLIA ZBYLANICA. 



Ctenocephalus, n.g. 

 At the head end a dorsal and a ventral erectile lip, whose end 

 lobes interdigitate : four cervical glands with two orifices in the 

 dorsal lip ; cephalic cuticle thickened like a turban with 

 transverse grooves ; low and narrow lateral lines without vessel ; 

 excretory pore absent ; two equal cirri ; belongs to the Poly- 

 myaria and Resorbentes. 



21. — Ctenocephalus tiara. Von Linstow. 



PI. II., figs. 23-27. 



From stomach of Varautis bengalensis, Daud. (" talagoya," 

 Sinh.), Bolgoda, and from stomach of Varanus salvator. Gray 

 (" kabaraguwa, " Sinh.), Horana, 



I described this species in the year 1879 under the name 

 Ascaris tiara.] I now perceive that it must form the type of a 

 distinct genus. The original specimens were taken from the Natal 

 monitor, Varanus ornatus^ Daud. 



The formation of the head is very remarkable, comprising a 

 dorsal lip with three rounded projections and a ventral lip with 

 foar similar processes, interdigitating ; the lips can also separate 

 from one another and be erected ; in their hinder portion there 

 are four club-shaped glands with round lumen, reaching backwards 

 0"2 mm. ; outwardly the glands are furnished with spiral muscles ; 

 the two glands on the right and left side, respectively, unite into 

 a common duct, and both ducts (right and left) open to the 

 exterior on the dorsal lip ; the cuticle is deeply grooved at intervals 

 of 0'088 mm. ; the oesophagus measures l-l- of the total length ; 

 the tail is conical ; dorsal and ventral tracts narrow ; the lateral 

 tracts (" Seitenf elder ") are broad and low, and do not project 

 inwards beyond the musculature ; they occupy, on each side, -^ 

 of the periphery of the body ; a septum divides them into dorsal 

 and ventral halves, but there is no vessel and consequently no 

 porus excretorius. 



The worms had bored with their heads deep into the wall of 

 the stomach, which had grown firmly round them ; the nutrition, 

 therefore, cannot take place through the mouth, but evidently, as 

 with Filaria and all other Resorbentes, through the cuticle ; the 

 lateral fields appear to play the part of absorbing organs. 



The male is 18-20 mm. long and 0*63-1 mm. in diameter ; the 

 tail measures .^^ of the total length ; the two falciform cirri Iiave 

 pointed ends and a length of 1*6 mm. ; there are on each side of 



t Wurttemb. naturw. Jahresh. Jahrg., XXXV., Stuttgart, 1S79, p. 320, tab. V., 

 fig. 1. 



