BY J. J. FLETCHER. 
1523 
seen whether these and other variable characters are as useful for 
purposes of classification, as they are interesting from the stand- 
point of morphology, 
I have to thank most cordially Messrs. A. G. Hamilton, T. G. 
Sloane, H. J. Fletcher, and the Rev. T. F. Potts for most valuable 
help in acquiring material ; also Mr. Masters who brought me the 
first specimens of C. manifestus which came to hand. I have also 
to thank the Trustees of the South Australian Museum, and Pro- 
fessor Tate, F.G.S., of Adelaide, for the opportunity of examining 
specimens, which, except in one case, were either not new, or on 
which from paucity of material or the immature condition thereof 
I am unable to report at present beyond saying that one of 
Prof. Tate’s specimens is certainly a new species, probably of 
Megascolides, but it is without any girdle and I have refrained 
from its dissection. 
Megascolides (Xotoscolex) Illawaeile, n.sp. 
Seventeen well-preserved rather contracted spirit specimens from 
5‘5 (juv.) to 20 cm. long, 4-5 to 7 mm. broad ; number of segments 
from about 240-395. (Ten other specimens are more or less frag- 
mentary). 
Colour more or less pale slaty-brown or drab, most noticeable 
anteriorly and on the dorsal sm-face. Prostomium broad from side 
to side, ribbed, its convex anterior surface marked with from 3-5 
vertical grooves ; not dividing the buccal ring •, the latter and 
usually to a less extent also the second segment ribbed all round 
right across from the anterior to the posterior margins. 
SetJB : the interval between the setie of the inner couples about 
half that between the inner couples themselves, and likewise about 
half that between the two couples of each side ; the outer row of 
setie of each outer couple in all the specimens irregularly sinuous 
after about segment xv, some of the setoe of these rows l>eing two 
or three times as far as others from the corresi)onding set® of 
the inner rows of these couples, the closest of them with an 
