1916. | J. STEPHENSON : Indian Oligochaeta. 327 
The ovaries are large, in xiii. A pair of relatively consider- 
able ovisacs are present in xiv, attached to septum 13/14 along a 
curved line on each side of the alimentary canal. 
The spermathecae (fig. I9) are two pairs, which pierce the 
bodywall in a rather lateral position in 7/8 and 8/9. The ampulla 
is elongated, of a rather irregular ovoid shape, and narrowing with- 
out any distinct demarcation to become the duct, half as long and 
half as wide as the ampulla itself. The diverticulum is implanted 
at the junction of ampulla and duct, and has the form of an ovoid 
sac with a stalk as long as itself. The whole diverticulum includ- 
ing the stalk is about one-third the length of the main ampulla. 
The penial setae (fig. 20) are in length -9mm., and in thick- 
ness 7; thus they are relatively very narrow. They have a 
gently undulating shape, but the proximal half is fairly straight, 
the curves being mainly in the distal portion. The tip is pointed ; 
the end may taper gradually, or there may be a slight bulbous 
swelling just above the extreme point. There is no ornamenta- 
tion, but there is a curious series of minor irregularities all along 
the distal portion of the shaft, which are illustrated in fig. 20. 
Remarks.—Notoscolex is a micronephridial genus; the presence 
of a species with a mixture of mega- and micronephridia is how- 
ever perhaps not more anomalous than the presence of similar 
species in the genus Megascolex (cf. descriptions of several such 
species in Stephenson, 25). Perionyx also, a typically megane- 
phridjal genus, contains a species with the mixed condition (P. 
annulatus, Stephenson, 23). The present species is near NV. savasin- 
ovum, of which it may even be the direct ancestor. I at first 
thought of putting it in Woodwardia,— a genus with perichaetine 
setae, meganephridia, and Pheretima prostates ; and it may indeed 
represent a connecting link between the two genera. It is usual, 
however, to derive Notoscolex from Megascolides by increased 
breaking up of the nephridia and development of a lobed prostate 
(Pherettma—-prostate) out of the tubular prostate of the latter 
genus. But there is no reason, as far as I can see, why some of 
the genera of Megascolecinae should not be polyphyletic ;— e.g. 
Mewascolex itself may be derived both from Notoscolex by the mul- 
tiplication of setae, and from Lampito (and so ultimately, perhaps, 
from the Perionychella forms of Perionyx) by the breaking up of 
the nephridia ; such a double origin appears to be hinted at by 
Michaelsen (12). 
It may be remarked that if Lampito is a valid genus, separated 
from its allies on account of the mixed mega- and micronephridial 
condition, the present species might also lay some claim to generic 
distinction. 
Gen. Megascolex. 
Megascolex ratus, Cogn. 
Trivandrum, 1911. A number of specimens on several different occasions. 
A few notes may be added to supplement the original descrip- 
tion (5) 
