96 
ZOOLOGY OF THE FAR EAST. 
If this is done, the name of the species which I have previously described 
from India and Ceylon, and have now received from Kyoto, and which Nomura des- 
cribes as Limnodrilus gotoi , Hatai emend Nomura, remains as Limnodrilus socialis,^ 
Stephenson. 
Fam. GEOSCOLECIDAE. 
Criodrilus bathybates, sp. nov. 
Off Komatsu. about half a mile E. of Komatsu Point, L- Biwa, Japan ; i8o ft., on a bottom 
of mud mixed with pebbles and many shells. Four specimens, all incomplete; two wanted the 
posterior and two the anterior end. The two anterior fragments apparently in an early stage 
of sexual maturity. 
External Characters. 
The length of the longest fragment was 123 mm., and the thickness of the body 
at its maximum 2 mm. The surface of the worms is a smooth shiny yellowish grey. 
The transverse section of the body is circular for the greater part of the length, but 
the hinder end is rather flattened, especially near its extremity, where the dorsal sur- 
face is concave and forms a broad shallow groove. The anus is terminal, and, in 
one of the two specimen^ which showed it, was seen to be flanked by prominent 
lateral lips. The nephridia appear as indistinct opaque white masses through the 
thin body walls. 
In the longest fragment there were 165 segments. 
The prostomium is large, prominent and zygolobous. 
There are no dorsal pores. 
The setae are small and closely paired; the relations are the same throughout 
the body; aa=bc, but dd is rather greater, about times aa. 
No clitellum was visible. 
The m.ale apertures are in segment xiii ; there are to be seen two small whitish 
papillae, rather elongated transversely, their middle points somewhat above the line 
of the ventral setae, their lower margin about on a level with the setae. The setae 
are absent ventrally in this segment. There are no other genital marks. 
It will be well to explain here that the numbering of the segments caused some 
difficulty. The position of the male pores so far forward as segment xiii is exceptional 
in the Geoscolecidae, and I at first assumed them to be on xv, a not unusual posi- 
tion, since I thought I counted fourteen segments in front of them. But on coming 
to examine the internal anatomy, this enumeration brought the testes to segments 
xii and xiii, the vesiculae seminales to xiv, and the ovaries to xv. The second speci- 
men gave the same result, which appeared quite impossible. A renewed examina- 
tion of the setae and of the segments at the anterior end of the animal showed that 
in front of the first seta-bearing segment there were two annuli without setae, separ- 
1 Two of my papers giving an account or a record of L. socialis reached Nomura while his paper " was in prepara- 
tion for the press " ; and since he recognized the identity of one of his species with mine, it seems a little perverse on 
his part, — even if he did not wish (as I believe is the proper course) to reject Hatai's name altogether,— to give that 
name to L. socialis rather than to the other, previously undescribed, species. He received L. socialis from Dr. Willey, 
from Ceylon (from whence one of my batches of material had been derived), and called L. willeyi the one which he did 
not receive from Dr. Willey. 
