54 Memoirs of the Indian Museum. [VOL vee 
of spermatozoa, and had while still im situ a rather glancing opalescent appear- 
ance. 
The prostate is an ovoid sac-like mass of considerable size, attached by a broad base 
to the body-wall. It is rather flattened laterally, and its lower part is yellower and 
apparently more muscular. A flocculent substance (? glandular cells) can be scraped 
off its surface by needles; the surface is however in the natural condition smooth. A 
small central cavity can be demonstrated by cutting across with scissors. The vas 
deferens joins it on its anterior margin. 
Segment xi is short antero-posteriorly; septa 10/11 and 11/12 are fused imme- 
diately above and at the sides of the alimentary canal, and thus form the floor of an 
ovarian chamber. The roof of the chamber is at the dorsal parietes, where the two 
septa mentioned are close together though separate, The ovarian chamber (=seg- 
ment xi) is thus opened in the ordinary dissection. ‘The ovaries are seen as narrow 
fringes lateral and dorso-lateral to the intestine on the anterior wall of the chamber; 
the funnels were not identified. 
The egg-sacs, diverticula of septum 11/12, are small, tubular, wider at the mouth 
and narrower at their hinder end, which is turned forwards. ‘They are entirely con- 
tained within segment xii. 
The spermathecal ampullae are broadly oval sacs of considerable size in segment 
viii, on the anterior wall of the segment, one on each side dorsal to the gut and 
almost touching each other in the middle line. The ductis narrow, coils considerably 
in viii, and pierces septum 7/8 to join the atrium at the base of the latter. The 
atrium is of moderate size, teat-like, with a cavity (as seen when examined micro- 
scopically after clearing with acetic acid) of simple form. . 
Remarks.—With the exception of D. parva (Bourne) no species of the genus seems 
closely to approach the present one. A comparison with D. parva is difficult, because 
on the one hand Bourne’s description (5) presents the extreme of brevity and baldness, 
and on the other I have only a single specimen of the present form, and there is thus 
no indication of the amount of variability which may be expected to occur. I separate 
the two partly on the ground of differences in the testis-sac, prostates, and, probably, 
colour; but perhaps more on the ground of the bodily proportions; Bourne’s specimen, 
though but little shorter than mine (75 as against 84 mm.) is only slightly over one- 
third the thickness (Bourne gives the circumference of his worm as 4°25 mm., which 
corresponds to a diameter of 14 mm.; the coloured drawing, however, which repre- 
sents the living worm of natural size, shows it as 24mm. diameter; the colour during 
life might, from the plate, be described as light brown with a pinkish tinge due to 
blood vessels). 
Drawida chalakudiana, sp. nov. 
(Plate VII, fig. 7.) 
Chalakudi, Cochin State; 14—30-ix-1914 (F. H. Gravely). Three specimens, of which one, the 
largest, bears sexual marks. 
External characters.—Length 41 mm., diameter I} mm.; colour bluish grey, dark 
on the dorsal, light on the ventral surface. Segments 135. 
