1914-] F.H.Stewart: Indian Helnnnthology, No. [. 169 



2. Oxysoma kachugae, sp. nov. 



PI. xxix, figs. 13-16. 



From intestine of Kachuga lineata, Gray: Lucknow. 



A single female specimen was found. For measurements see 

 table II, page 186. 



The head (figs. 13, 14) is expanded like the head of a nine- 

 pin. Body diminished in breadth uniforml}^ from the middle 

 toward either extremity. The tail (fig. 16) is moderately sharp 

 pointed and curved on itself at the tip. 



The head bears three flattened lips, one dorsal, two sub- 

 ventral, which are entirely composed of cuticle. Each lip is 

 however supplied with two forked papillae of corium. As can be 

 seen in fig. 13 the outer branch of the papilla is flask-shaped and 

 parallel with the length of the body, the inner is thinner and 

 inclined inward. The corium from which these papillae spring 

 surrounds the commencement of the oesophagus. 



The cuticle is transversely striated, the striae being very 

 uniform in breadth. 



There are narrow lateral membranes. 



The vulva is a narrow slit in the ventral line without promi- 

 nent lips. 



The anus has slightly prominent lips. 



The oesophagus (fig. 15) is divided into three sections: (i) 

 •074 mm. long, represents the ' pharynx ' of Dujardin, Its anterior 

 extremity is dome-shaped — the dome rising into the space between 

 the lips. Three fine tubular structures — one ventral, two sub- 

 dorsal — are found in this portion, and are doubtless tubular dilata 

 tions of the outer ends of the radii of the oesophageal lumen. The 

 body of this part of the oesophagus shows the same muscular 

 structure as the remainder of the organ. Part i is separated from 

 part 2, by a transverse diaphragm. (2) 1*416 mm. long, shows 

 three fine cuticular tubes corresponding with those of part i. 

 The tubes, however, do not appear to be continuous with those 

 of part I, but are separated from them by the diaphragm. 

 Their anterior extremities are dilated (fig. 15), and it is the cuticle 

 lining these dilatations, which produces the appearance of teeth 

 referred to by Dujardin. With the exception of a short portion at 

 its anterior end, this part of the oesophagus is of a dark brown 

 colour. The colour ceases abruptly at the commencement of the 

 bulb. Special aggregations of this pigment occur on the surface 

 of the organ in the median and lateral lines '272 mm. from the 

 head. (3) The bulb is pear-shaped "425 mm, long. 



The intestine is dilated at its commencement where it em- 

 braces the bulb, but further back is compressed by the gonads. It 

 is coloured in the same manner as the oesophagus. 



Impregnation with this colouring matter renders the reproduc- 

 tive organs difficult to decipher. The vagina is apparently non- 



