1916. | J. SreEPHENSON : Indian Oligochaeta. 343 
Genital markings are present in or rather just in front of fur- 
rows 13/14, 14/15, and 15/16; in some cases there was an addi- 
tional pair in relation to furrow 16/17. These are small, oval or 
almost circular slightly raised areas, with a somewhat darker cen- 
tre. They take up approximately a space corresponding to the 
interval ab, but may slightly overstep these limits on one or other 
side. 
Internal Anatomy.—Septum 4/5 is thin, 5/6 is moderately 
thickened; then two septa are missing; 8/9 is thin, 9/10 and Io/II 
considerably thickened, and the following ones thin. Septa 9/10o— 
11/12 are crowded together. 
The gizzard, subspherical and moderately firm, is in the inter- 
val between septa 5/6 and 8/g. Calcareous glands, in segment xii, 
are not separated off, and are only discovered on opening the oeso- 
phagus; the oesophagus is also slightly swollen in segment xiv. 
The intestine begins in xv. 
The last heart is in xiii. The dorsal vessel is continued for- 
wards over the gizzard to the pharynx; the hearts of segments vii 
and viii are close together behind the gizzard and in front of sep- 
tum 8/9; the next commissure is at the anterior end of the gizzard, 
and the next after that in front of 5/6. The missing septa and the 
exact morphological position of the gizzard can thus be established. 
The excretory system is micronephridial. Behind and on the 
clitellum there is a single row of relatively large tufts, about seven 
in number on each side, transversely disposed in each segment; 
these are set closer together ventrally than on the other regions of 
the bodywall. On some of the anteclitellar segments the tufts are 
more numerous; and in segment iii the bodywall is densely covered 
with micronephridial tubules; there are however no large tufts 
such as are commonly met with by the side of the pharynx and 
gizzard. 
Testes and funnels are present in segments x and x1; there 
appears to be no marked difference in size between those of the 
two segments; those in x are not rudimentary, as they were in 
Michaelsen’s specimens of the type form and would have been 
passed without comment if met with elsewhere. 
Vesiculae seminales are present in segments ix and xii; those 
of ix are soft lobulated masses of moderate size, those of xii are 
large, and on one side extend back through segments xili and xiv, 
though on the other they merely cause a considerable bulging back 
of septum 12/13. The conditions in this region are primitive as 
compared with most species of the genus; septum I1/I2 is not 
absent, and the corresponding heart is not bound down to the 
alimentary canal by dense connective tissue. 
The prostates and their ducts form a continuous tube on each 
side, beginning behind in segment xix; each tube is of the same 
diameter throughout, the glandular part being soft and white, 
the terminal portion more glistening. The vas deferens passes 
back on the outer side of the termination of the prostatic duct, 
and then swells into a pouch behind it. 
