334 



Memoirs of the Indian Museum. 



[Vol. VIT, 



0-lmm,. 



Fig. 69. — Diaphanocephalus minutus. Dorsal lobe 

 of bursa ; dorsal view. 



e.d., externo-dorsal ray. 



They are grooved on the ventral surface and slightly recurved at the tip. An access- 

 ory piece is absent. The anterior limit of the male genital tube is about 1*2 mm. 



from the head. 



The tail of the female is drawn out 

 to a rather acute point and measures o - 28 

 to 0-3 mm. in length. The vulva is 

 situated in the posterior half of the body, 

 dividing the latter in the proportion of 

 1 2 -5 : 5. It is fairly prominent. There 

 is a short vagina about 0*14 mm. long, 

 running forwards, from which are given 

 off two well-formed ovejectors which run 

 anteriorly and posteriorly respectively. 

 The combined length of the ovejectors is 

 from 0*450 to 0*5 mm. The anterior 

 uterus runs to within o - 8 mm. of the base 

 of the oesophagus, whilst the posterior 

 runs to within about 0*4 mm. from the 

 tip of the tail. The anterior uterus is 

 commonly folded round the intestine, while the posterior has usually only a single 

 bend. The ovaries commence at the points where the respective uteri bend, and run 

 towards the middle of the body to cross each other just anteriorly to the vulva. The 

 eggs in the uterus are thin-shelled, and measure 0*068 mm. in length by 0-031 mm. 

 in breadth. Their contents are unsegmented. 



Diaphanocephalus, sp. 



One female in poor condition and a fragment of another female were collected 

 from a cobra, Naja tripudians. The complete specimen is larger than the members 

 of the preceding species, measuring i5 - 5 mm. in length and 043 mm. in thickness. 

 The head, which is laterally compressed, measures 027 mm. in dorso-ventral diameter. 

 The buccal cavity is 0*19 mm. deep. The structure of the head is similar to that 

 described for Diaphanocephalus minutus. The oesophagus measures 0*485 mm. in 

 length by o*i6 mm. in thickness. The vulva is situated in the posterior portion of 

 the body, dividing it in the ratio of 6 : 5. Its lips are modified into a papilliform 

 outgrowth which measures o*i4ixo*o8 mm. The ova in the uterus are thin-shelled 

 and measure 0*065 X 0*045 mm. Their contents are unsegmented. The tail measures 

 0*45 mm. in length and is acutely pointed. 



So far the only species described from the cobra is the preceding one, Diapha- 

 nocephalus minutus. The specimens under consideration differ from that species in 

 their size and in the form of the vulvar opening. 



Diaphanocephalus, sp. 

 Large numbers of females of a species of Diaphanocephalus were collected on 

 nine different occasions from Russell's viper in Calcutta. There were no males. 



