300 Records of the Indian Museum. Wor, 2s 
expected, at any rate from regions represented in the present 
collection. The genus Megascolides appears again in its double 
distribution, on the one hand S. India, and on the other the E. 
Himalayas (cf. Stephenson, 23). The record of an apparently 
endemic species of Pheretima in S$. India represents an extension 
of the proper range of the genus beyond the limits that have 
hitherto been assigned to it. New species of Peritonyx from the 
E. Himalayas are in accordance with what was to be expected. 
The Glyphidrilus described below (G. tuberosus} is an interest- 
ing novelty ; the genus has, however, previously been recorded in 
India, and its bearing commented on by Michaelsen (14). The new 
species belongs distinctly to the Further India group, and is not in 
any way closely related to the African G. stuhlmannt. 
Artificial introduction must account for the presence of Dicho- 
gaster bolaui (Mchisn.) subsp. palmicola (Eisen), described by Eisen 
from the Pacific Coast of America, in the compound of the Mu- 
seum. 
An interesting series of specimens of Aulophorus necessitates 
the fusion of two species, and it is possible that another will sooner 
or later have to be merged in A. furcatus. Some of the specimens 
were sexually mature, and I give below an account of the appear- 
ances ; so far as I know there has hitherto been no description of 
the genital organs of any species of Aulophorus 
My best thanks are due to Dr. Annandale for kindly allowing 
me the opportunity of examining this extensive collection. 
Fam. NAIDIDAE. 
The determination, from preserved material, of species belong- 
ing to the Naididae is liable to be very unsatisfactory. Though 
the family is particularly fascinating to study in the living condi- 
tion, spirit specimens are extraordinarily troublesome ; and this is 
due to several causes. In the first place the setae, on the minute 
description of which so much depends, cannot be seen as a rule in 
their whole extent nor in one plane. One can easily, simply by 
allowing the water to evaporate, cause the coverslip to exercise 
sufficient pressure on a fresh specimen to flatten it completely ; 
but this does not answer with preserved material. The only way is 
to soften the specimen by treatment for some time with solution of 
potash ; and I once thought that this would prove a method of 
some value. But I now find that the potash distorts the setae ; 
and the more, the longer the specimens remain in the solution. 
According to my observations the setae-may actually swell from a 
thickness of 3/ to as much as 7/ ; and although the length, position 
of nodulus, and even the general curve of the shaft are more or less 
maintained, the shape of the terminal prongs is quite unreliable in 
specimens so treated. 
Secondly, the preservation of the setae often leaves much to 
be desired. It may happen that throughout the whole length of a 
