432 Records of the Indian Museum. [Voi<. XXIV, 



Megascolex mauritii (Kinb.). 



Bombay. Coll. Prof. J. P. Mullan. 

 Ahmedabad. Coll. Prof. J. J. Asana. 



Megascolex horai, sp. nov. 



Cherrapunji, Assam ; under stones and in muddy pools around Dak 

 Bungalow. 28 - x*i92i. S. L. Hora. A single specimen. 



External Characters : — I v ength no mm. Diameter 2*5 mm. 

 Segments 188. Colour yellowish grey, no difference between dor- 

 sal and ventral surfaces. A long thin worm. 



Prostomium slightly epilobous (?). 



Dorsal pores begin in furrow 10/11. 



The setae are disposed in rings ; they are of fair size, and form 

 fairly regular longitudinal lines. In front of the male pores the 

 ventral break is equal to 3-4 ah; in the middle and hinder parts 

 of the body to 2^-3 ab. The dorsal break is equal to 2-3 yz 

 anteriorly, but is much smaller behind the genital region (i£-i£ 

 yz). The following numbers were counted: v/26, ix/27, xii/32, 

 xix/32, and in the middle of the body 28. 



The specimen was apparently not fully mature. There was 

 no clitellum, and no genital papillae or markings of any kind. 



The male pores are on segm. xvii, on papillae, in line with 

 setae b, about one-fifth of the circumference apart. 



The female apertures are not visible. 



The spermathecal pores are in furrows 6/7 and 7/8, in or just 

 internal to the line of b, about one-fifth of the circumference apart. 



Internal Anatomy:— Septum 4/5 is thin, 5/6 is very thin, 6/7 

 is thin and attached to the ventral body-wall behind the normal 

 site of insertion, — on the left side nearly at the level of furrow 

 7/8 ; the following septa as far as 13/14 are perhaps slightly 

 strengthened, but not much ; 7/8 is displaced backwards in the 

 same way as 6/7, 8/9 is attached slightly behind its normal line of 

 insertion, but the rest are not displaced. All the septa as far 

 back as 12/13 are strongly convex backwards. 



The gizzard is in segm. vi, firm and barrel-shaped. 



Calcareous glands are present in segms. x, xi and xii ; they 

 are of moderate size, are stalked, and the margins may be lobul- 

 ated. The intestine begins in xv. 



The last heart appears to be in segm. xii. 



There are tufted nephridia in segm. v. In the body generally 

 the micronephridia are arranged in a single transverse row in each 

 segment. 



Testes and funnels are present in segms. ix and x. Seminal 

 vesicles are found in xi only ; they were small in size in the 

 present specimen. 



The prostates are small — perhaps not fully developed ; they 

 are lobular and deeply bifid on the outer border. The duct is 

 bent round sharply at its ectal end. 



Ovaries and perhaps funnels were seen in segm. xii. 



