1915.] | J. STEPHENSON : Indian Oligochaeta. 81 
This species was recently described by me (20) from Pattipola, Ceylon. I give 
below an account of the external features of the present specimens, which differ 
somewhat from those of the type, together with a few additional notes on the inter- 
nal anatomy. 
External characters. —Length 48-80 mm., maximum breadth 2-24 mm. ; colour 
grey with a purplish tinge on the anterior half of the dorsal surface, and a purple 
mid-dorsal line, clitellum browner. Segments 100—126. 
Prostomium epilobous 4 ; ‘tongue’ cut off behind by a transverse groove. 
First dorsal pore in groove 4/5. 
- The setae are arranged in fairly regular longitudinal rows. The ventral break 
in the continuity of the rings diminishes backwards : in front of the clitellum aa= 
2-24ab; in middle of body =14ab; towards the posterior end the ring is closed. 
Dorsally, in the anterior and middle regions zz=14-2yz, posteriorly the interval is 
small and irregular. The setae are small and difficult to count:—v and vi/ca. 34, 
ix/38, xii/38, in middle of body 36 or 38. 
Clitellum as in previous description, xiv—xvi=3 ; in one specimen extended over 
posterior two-thirds of xiii also. 
The male apertures, in xviii, on whitish round papillae, the bases of which take 
up the greater part of the length of the segment. Their position corresponds to line 
c; there are no setae between the apertures. 
The female apertures are in a transversely extended whitish area on xiv, probab- 
ly paired and in front of setae a,—though they could not be made out distinctly. 
The spermathecal apertures, in 7/8, 8/9, have their centres in e. 
While in the second batch of specimens the genital markings appear as pits (as 
in the type, whence the specific name), in the first batch they were not depressed, 
though on the other hand scarcely elevated. ‘They were here a pair of oval, almost 
circular, patches, flat, darker in colour in their centre, situated in 19/20 rather inter- 
nal to the line of the male apertures,—their centre being just outside 6, and their 
whole transverse extent from a to between c and d. 
Internal anatomy.—The first septum is 4/5 ; thereafter all are present; 12/13 and 
apparently a variable number in front of and behind this are slightly to moderately 
thickened. 
In segment vii is the gizzard, which does not take up the whole of the interval 
between the septa. In the anterior part of vii the alimentary canal is dilated, soft 
and transparent; in the posterior half its character suddenly changes, and it becomes 
a gizzard, though a somewhat rudimentary one,—short and cylindrical, ending 
abruptly in a thickened ring at the posterior limit of the segment, and bulging back 
septum 7/8 considerably. The gizzard is not, as usual, obvious on first opening the 
animal, but is seen only on looking for it by displacing segment 7/8. 
Here again the nephridial system is of considerable interest. Micronephridia are 
few or absent on the inner surface of the body-wall in front of the clitellum ; they are 
thickly present on the ventral half of the body-wall in the clitellar segments, and are 
also numerous behind the clitellum. In addition, in specimens of each of the two 
