2o6 Memoirs of the Indian Museum. [Voi,. I, 



in the 15th segment, with a big typhlosole which consists of two longitudinal 

 lamellae rising from a common base. 



Circulatory system : Last hearts in the 13th segment. 



Nephridial system micronephric. 



Anterior male organs: Two pairs of sperm-duct-funnels and testes in the 

 loth and nth segments, embedded in free sperm-masses which are not enclosed in 

 seminal vesicles. Two pairs of sperm-sacs depending from septum 11-12 into the 12th 

 segment and from septum 9-10 into the 9th segment. The latter are simple and 

 very much smaller than those in the 12th segment which are incised and consist of. 

 some rather big divisions. 



Prostates of moderate size, hardly exceeding the segment of their opening, 

 tube-like. Glandular part moderately thick and rather long, convoluted in a plane. 

 Duct much shorter and thinner than the glandular part, abruptly set off from the 

 latter, describing one or two short, broad loops. 



Penial setœ (fig. 65) about 0-9 mm. long and 17 m thick, rather straight, 

 only bent a little at the distal end, especially at the tip, which narrows rather 

 rapidly and is excavated like a spoon at the concave side of its curve. Beneath this 

 spoon-like outer end the penial seta bears some more or less regular, some very 

 irregular, oblique or broken circles or rows of delicate triangular teeth. 



Spermathecse (fig. 66) : Main pouch with a long oval or sac-like ampulla and a 

 much shorter and thinner duct which is set off more or less abruptly from the ampuUa. 

 Into this duct opens an indistinctly stalked diverticulum which is generally divided by 

 one or two more or less deep incisions into two or three irregular lobes ; it is rarely 

 simple. Sometimes the incisions or one of them even splits the diverticulum almost 

 to its base. The diverticulum is about a fourth as long as the ampulla and generally 

 broader than long. 



Copulatory setae (fig. 67) : The ventral setae of the 8th and 9th segments are 

 changed to copulatory setae. They are about o-6 mm. long and 17 /x thick, and some- 

 what bent. The distal end is almost bill-shaped, a little depressed at the sides and 

 showing at each side a longitudinal, not very prominent ridge which disappears further 

 down the seta. The distal half of the seta, with the exception of the bill-shaped end, is ' 

 ornamented with a great number of rather densely placed circles of small triangular 

 teeth. These circles are sometimes a little irregular. 



Hab.— Deccan, Hyderabad; Col. D. C. PHILLOTT leg. 



OCTOCH^TUS MAINDRONI, MICHI.SN. 



F. TYPICA. I 



(Plate xiv, fig. 29.) 

 0. m,, typ., MICHAELSEN, in Mt. Mus. Hamburg, xxiv, p. 168, f. 15. 

 Present one mature specimen. 



External Characters, — Dimensions: Length 180 mm., thickness 4^ — S^nin., 

 number of segments 198. 



