226 Records of the Indian Museum. [Vol. VIII, 



Male genital organs. — The penis when contracted forms a 

 small conical prominence inside the lumen of the long tubular 

 penial sheath at its distal end. The flagellum lies along the side 

 of the penial sheath, extending from the base of the penis to the 

 proximal end of the sheath. The penial sheath is a tubular 

 structure fused with the Simrothian gland about half its length 

 from the proximal end, and having a common lumen for the two. 

 The right Simrothian gland is a tubular structure fused with the 

 penial sheath for a short distance from its proximal end. The 

 tube consists of a narrow and loosely coiled distal portion, and a 

 thicker proximal portion provided with a rounded projection into 

 its cavity at the beginning. 



Female genital organ. — The female genital organ forms a small 

 flattened body applied to the inner surface of the pulmonary area 

 and opening into the external aperture b}^ a short duct. There is 

 no distinct albuminiparous portion of the gland. 



IV. Nervous System. 



The ganglia form a squarish mass with the aperture for the 

 oesophagus and two salivary ducts. The cerebral ganglia are 

 closely united to each other and are placed on a higher level than 

 the others. The pedal and viscero-pleural form a compact mass 

 behind the cerebral. The pedal cords, one from each ganglion, 

 pass backwards to the posterior end. 



The two buccal ganglia lie in the angle between the radular 

 portion of the pharynx and the oesophagus, a little behind the 

 beginning of the latter. They form a pair of oval bodies closely 

 applied to one another like a pair of beads. There are three 

 nerves from each ganglion, one of which is connected to a nerve 

 from the cerebral ganglion. 



V . Pedal Gland. 



It is a stout tube more or less flattened on the dorso-ventral 

 line. It is bent on itself a little in front of its middle so that the 

 posterior portion is directed to the left of the animal. The latter 

 portion of the tube lies in contact with the ventral aspect of the 

 salivary glandular mass, with which it is connected by means of 

 connective tissue. 



LITERATURE. 



In addition to the literature mentioned in m}^ last paper '' On 

 the Anatomy of Atopos (Podangia) sanguinolenta (Stol. MS.), the 

 following papers were also consulted • — 



I. E. Ghosh, ''On the Anatomy of Atopos {Podangia) 

 sanguinolenta (Stol., MS.)." Records of the Indian 

 Museum. Vol. vii. Part ii, No. 17, 1912. 



