Gatty Marine Laboratory, St. Andrews. 3 
A fragment devoid of the anterior region, resembling 
a curved larva of an insect, of a rounded form and 
apparently thickest posteriorly, for it tapers anteriorly, 
where the segments are longer, and closely ringed through- 
out the rest of its extent. Each segment bears two short 
gills, thus differing from Humenia crassa or E. jefreysii, and 
they are longest behind the middle and diminish in the 
caudal region. They spring apparently from the posterior 
edge of each segment-junction, and generally in the pre- 
paration present a somewhat club-shaped outline (PI. I. 
fig. 8) witha firm cuticular investment having a finely 
granular hypoderm beneath. They are marked by transverse 
strize, probably due to the circular fibres, whilst internally is 
a large blood-vessel which may form a loop distally, though 
the state of the specimen rendered this uncertain. Some 
of the gills contained large granular cells, but the nature of 
these has not been ascertained, 
The segments (V1. IL. fig. 9) are simple—that is, without 
rings,—each dorsally slightly overlapping the anterior edge of 
the succeeding segment, and from the curve of the body the 
dorsal antero-posterior diameter is wide, the ventral narrow. 
The posterior segments become increasingly narrow and 
terminate in the anus, which has beneath it two papille. 
The dorsal surface of the body is convex, the ventral presents 
a slightly flattened surface with a shallow groove posteriorly. 
The cuticle, moreover, by dipping in formed a series of 
reticulations, which here and there were arranged in long 
rows. 
A remarkable feature was the apparent absence of bristles, 
no trace of which was observed until the fragments were 
put in xylol, when a vertical row of minute poimts—appar- 
ently the bases of bristles, though at first sight resembling 
minute uncini—was observed. ‘The arrangement of the gills 
at once distinguishes this species from Humenia crassa, Uirst., 
and E. jeffreysii, M‘I. 
Eumenia caulleryii *, sp. n. 
Dredged in an inland sea in Japan, lat. 83°48’ N. and 
long. 183° 19’ E., in 26 fathoms, in 1874, by Capt. St. John, 
and kindly forwarded by the late Dr, Gwyn Jeffreys, 
Two complete examples resembling Humenia crassa, Mrst., 
in general appearance, but which had been rendered horny 
by drying, were obtained, the ends especially suffering from 
* Named after Prof. Maurice Caullery, of the Sorbonne, Paris, a 
distinguished investigator of the Polychwts. 
1* 
