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Memoirs of the Indian Museum. 



[Vol. VII, 



unequal. The right spicule is fairly stout and measures about 097 mm. in length. 



It has no barb or prong, such as is found near the tip in several species, but the tip 



appears to be simple and finely pointed. 

 The left spicule is very slender and delicate, 

 and measures only about 0*43 mm. in 

 length. 



In the female the tail is about 03 mm. 

 long, finger-shaped, rather blunt, and 

 slightly bifid at the tip. There is a pair of 

 caudal papillae at 0*17 mm. from the tip, 

 situated in little dimples in the cuticle- 

 The vulva is in front of the middle of the 

 body, at 91-104 mm. from the anterior 

 end. It has exceedingly prominent lips, the 

 anterior lip being considerably larger than 

 the posterior, and overlapping it. Each 

 of the lips (fig. 59) consists of a cuticular 

 swelling with granular contents, and has 

 the appearance of being divided internally 

 into a number of compartments by parti- 

 tions originating from the cuticle. The 

 muscular vagina is very narrow, running 

 back almost in a straight line for about 2 

 mm. At its inner end it gradually widens 

 into the short unpaired portion of the 

 uterus, which continues to run posteriorly. 

 The two uterine branches are directly op- 

 posed. The posterior branch, as usual, 

 has no ovary, but ends blindly at a short 

 distance in front of the anus. This blind 



branch becomes filled with embryos derived from the other branch, in mature females. 



The worm is, as usual, viviparous. 



This form is extremely closely related to the European G. microcephalus (Duj., 1845). On comparison, 

 however, with specimens which we believe to belong to that species, we find that, apart from size, 

 which is too variable to be of much importance, G . kachugae differs from them in the following points : — 



(1) The "tridents" of the buccal apparatus are of slightly different shape, their outer prongs 

 being longer and more flattened and expanded at the free end in G. microcephalus than in G. kachugae. 

 The colour of the whole buccal apparatus, and especially of the ring and tridents, is much darker in 

 C. microcephalus. 



(2) The longer (right) spicule of the male is simple in G. kachugae, pronged in C. microcephalus. 

 In the former it measures 097 mm. in length, in the latter 085 mm. 



(3) The lips of the vulva in G. kachugae are much more strongly developed than in G. microcephalus. 

 In the latter the posterior lip is often completely hidden by the anterior lip. 



As regards other species already described from tortoises, C. americanus , Magath, 1919, has a barbed 



Fig. 58. — Camallanus kachugae. Posterior end 

 of male ; lateral view. 



i., intestine; I., left spicule; r., right spicule ; 

 s.d.. sperm-duct. 



