2i8 Recunis of the Indian Museum. [Vol,. VIII, 



cells, the pear-shaped bodies of which are placed upon the connec- 

 tive tissue layer. 



The intestine begins from the hinder end of the oesophagus, 

 and passing through the substance of the midgut gland for a short 

 distance emerges from its anterior end towards the right side. It 

 then curves forwards and outwards to the right and then passes 

 backwards to end in the anus, which lies just in front of the female 

 genital aperture. 



Minute structure. — The intestine consists of the following coats 

 from without inwards: — 



(i) A thick transverse layer of muscle-fibres. 



(2) Scattered and irregular longitudinal bundles of muscle- 



fibres, widely separated from one another by the trans- 

 verse muscle-fibres and connective tissue. 



(3) A layer of sub-mucous tissue thrown into a number of 



longitudinal folds, being very thick along the folds but 

 quite thin at the intervals. The layer consists mainly 

 of white fibres with a few yellow elastic fibres and con- 

 nective tissue cells. In this layer are seen numerous 

 unicellular glands, the ducts of which open into the 

 cavity of the intestine. 



(4) The mucous membrane consists of a single layer of colum- 



nar epithelium, with ducts of the unicellular glands 

 between the cells. 



IV. Reproductive System. 



The animal is hermaphrodite. The male genital organs are 

 very compressed and are placed beneath the proboscis sheath to the 

 right. The main portion of the female genital organ also forms a 

 flat triangular mass lying on the right side of the anterior end of the 

 midgut gland and applied to its side. The female portion lies 

 behind the male portion, the retractor penis muscle of the latter 

 onl}^ passing over the female portion to be attached to the bod}'- 

 wall behind it. I could not find any connection between the male 

 and female genital organs. On examining the section of the 

 female portion from the smaUer specimen (as that of the larger 

 specimen was accidentally lost), I could not find any spermatozoon 

 in the acini. The question about the connection between the male 

 and female portions still remains unsettled as I could not examine 

 the mature specimen. 



The main portion of the female genital organ consists of a 

 glandular mass which lies on the right side of the liver. The 

 glandular mass is placed a little obliquely, with the flattened sur- 

 faces applied to the liver on the inner side and to the inner surface 

 of the body- wall on the outer. The anterior border is broad and 

 irregular, while the posterior border is tapering and pointed. The 

 ovarian portion of the organ is inseparable from the albumen gland, 

 both of which are included in a single mass. It forms a trans- 

 lucent portion occupying about the anterior three-fourths of the 



