288 



Memoirs of the Indian Museum,. 



[Vol. VII, 



ous ridges are well-developed and marginal. The oesophagus is without bulb or 

 ventriculus, and measures 3 '5-4*7 mm. in length. A well-developed, but rather 



narrow, intestinal caecum, O"g-i - mm. 

 long, is present, running forward beside 

 the oesophagus. The very small cervical 

 papillae are situated at about 0*9 mm. 

 from the anterior end, the nerve-ring at 

 07-074 mm., and the excretory pore at 

 o*9 mm., from the same point. 



In the male, the conical tail (fig. 24) 

 is only 0*16 mm. long, and there are no 

 caudal alae. The two equal spicules are 

 remarkably short (05 mm.) and are sim- 

 ple, cylindrical, slightly tapering rods. 

 There are some 32 pairs of preanal papil- 

 lae, those nearest to the cloaca being very 

 small, the more anterior much larger. 

 In addition to these there is one small, 

 sessile, median papilla on the anterior lip 

 of the cloaca. The postanal papilla? are 

 arranged in five pairs, of which the first 

 and third from the tip of the tail are ventral, the rest lateral, in position. 



In the female, the tail is conically pointed and 032 mm. long. There is a pair 

 of caudal papillae at 0*065 mm. from the tip. The vulva is situated at 65 mm. 

 from the anterior end of the body, i.e., a little behind the anterior quarter. There is 

 a long muscular vagina, following a very irregular course in a generally posterior 

 direction, but with occasional forward loops. The two uterine branches are wide and 

 thin-walled, and run backward with a rather sinuous course. The coils of the ovaries 

 occupy the posterior region of the body, as far back as about 1*5 mm. from the tip 

 of the tail. The eggs are oval, with a rather thin shell, measuring 0*0675-0 "075 X 

 0*05 mm. 



Genus Dujardinia, Gedoelst, 1916. 

 Dujardinia helicina (Molin, i860). 1 



We refer to this species two immature females from the stomach of Crocodilus 

 porosus from Port Canning, Gangetic Delta. The specific determination is possibly 



Fio. 24. — Amplico ecum varani 

 lateral view. 



c, cloacal aperture. 



Tail of male 



1 Gedoelst (1916) describes a form, from an African crocodile, which he identifies with A. helicina, Molin, erecting for 

 it a new genus Dujardinia. Skrjabin (1916) also describes what he believes to be A. helicina, Molin, from an African 

 crocodile, and proposes for it the new genus Trispiculascaris. Travassos (1920) considers both Gedoelst's and Skrjabin's 

 species distinct from A. helicina, Molin, and renames Gedoelst's form Dujardinia dujardini, and that of Skrjabin Tris- 

 piculascaris trispiculascaris. As, however, this author gives no morphological reasons for his views, we are unable to 

 discuss them. Examination of African material existing in the British Museum, and already regarded as Dujardinia 

 helicina (Molin) of Gedoelst, shows that the oesophageal and intestinal structure described by Gedoelst is present. 

 This is definitely stated by Skrjabin to be absent in his material. On the other hand, an accessory piece similar to that 



