170 Memoirs of the Indian Museum. [Vol. I, 



There are no distinct calciferous glands, but in the 13th and 14th segments the 

 œsophagus is somewhat swollen and the inner surface of its wall is irregularly lameL 

 lated and papillated. 



Circulatory system : L^ast hearts in the 12th segment. 



Nephridial system meganephric. Meganephridia of neighbouring segments 

 quite equal. 



Anterior male organs: Two pairs of tuft-like testes and of much folded 

 sperm-duct-funnels free in the loth and nth segments. Two pairs of rather compact, 

 at the surface roughly mammillated, sperm-sacs depending from septa lo-ii and ii-i2. 

 into the nth and 12th segments. 



Prostates quite restricted to the i8th segment. Glandular part relatively small, 

 lobate, deeply incised at the medial side, duct about as long as the glandular part, 

 straight, rather thin, especially at its distal end, which opens directly to the exterior. 



Copulatory setse: The setae of the i8th segment medial from the lines of the 

 male pores are modified. They are more than twice as long as the setse just lateral 

 from those lines. Whilst the latter ordinary setse are about 03 mm. long and 13 ix thick, 

 these modified setse are about 07 mm. long and 17 ^ thick. They are nearly straight, 

 being only very slightly bent at the distal end, which has a simple tip. I could not detect 

 a distinct ornamentation. Only at high microscopical powers I saw what seemed to 

 be some very fine hair-like structures near the distal tip, closely appressed to the sur- 

 face of the seta. These copulatory setse represent the first step of modification 

 towards the development of penial setse from ordinary setse. They still remain in 

 the original situation, being not yet strictly united to the opening of the prostates, 

 and, further, show only a slight difference from the shape of the ordinary setse. 



Female organs: A pair of great tuft-like ovaries in the 13th segment. 



Spermathecse very simple, consisting only of a small, nearly globular ampulla, 

 which opens to the exterior by means of a short thin duct. There are no diverticula. 

 I am not quite sure whether these spermathecse have already attained their fuU 

 growth and their final structure, but it is probable, as the examined specimen ap- 

 peared fully mature in all other respects. 



Hab, — Western Himalayas, Naini Tal in the Kumaon district, 6,400'; 

 Dr. N. ANNANDAIvE leg., 28-ix— 3-X-06. 



PERIONYCHEIvI^A SIKKIMENSIS, MICHI.SN. 

 (Plate xiii, figs. 12, 13.) 

 p. s., MICHAELSEN, in Mt. Mus, Hamburg, xxiv, p. 156. 



Present one mature specimen and five immature ones, some of which are some- 

 what doubtful. 



External Characters.— Dimensions of the mature specimen, which, perhaps, is 

 not quite complete : lycngth 120 mm., thickness 4 — 5 mm., number of segments 109 

 (hinder end regenerated). 



