406 W. C. M‘INTOSH ON THE ANNELIDA 
about six rows of spines at the upper part of the shaft; and the terminal division has 
three or four segments, the basal (in the case of those possessing four) being about as 
long as the three distal; the tips are slender and bifid. The next lower series are 
stouter, with about four distinct spinous rows on the upper part of the shaft, and a 
terminal division of one or two segments, the tip resembling the beak of an eagle. 
The inferior series are slender, with about two rows of spines at the upper part of the 
shaft, and a terminal region of two or four divisions, with a delicately bifid tip. There 
appear to be some minute warts along the inferior margin of the foot. The ventral 
cirrus is slender and rather short, scarcely reaching the tip of the foot. 
STHENELAIS LIMICOLA, Ehlers, occurred in 30-370 fathoms off the Irish coast in 1869, 
and an eyeless variety in 420 fathoms in the same region. 
STHENELAIS JEFFREYSI, n. s. Dredged in 165 fathoms off the west coast of Ireland 
(Station 9) in 1869. 
The specimen is about 14 inch long, and apparently eyeless (in spirit). The scales 
are furnished with a limited number of papilla, which greatly exceed those of S. boa 
in length, though they are much less numerous. The surface of the scale is compara- 
tively smooth; and the organs are delicate, translucent, and somewhat reniform in out- 
line. The number of papille on the truncated exterior border is about ten (Pl. LX XII. 
fig. 18); and the contrast with those of S. boa is evident by glancing at a fragment of 
a scale from the latter similarly magnified (fig. 19). In the latter figure the edge of 
the scale has been doubled, so as to show (somewhat out of focus) the smaller papille 
on the surface. Very large examples of S. doa from Herm have the same relations be- 
tween the various papillee of the scales. 
The superior division of the foot bears about three papille at its tip, and a series 
of the usual slender bristles, most delicately serrated, with fine and rather closely set 
rows of spines. The inferior branch has one or two papille at the tip of the central 
part, and one on each of the lobes above and below. ‘The superior series of bristles 
have four rows of spines at the end of the shaft, and a most delicate tapering terminal 
process, finely pointed (Pl. LX-XIII. fig. 1, which shows a bristle somewhat compressed 
by others). From the neighbourhood of the inferior lobule are some with shorter tips, 
and a claw with a flat secondary process filling up the concavity. There are apparently 
two or three segments in the terminal process of the latter bristles, a basal about half 
the total length (when there are two segments), and one or two shorter beyond (PI. 
LXXIII. fig. 2). The most inferior are delicate bristles with a long terminal process 
of six or seven segments, and a very minute claw at the tip, the secondary process 
again filling up the hollow (fig. 3). Ventrally there are thus three series:—(1) the 
strong superior, with tapering filiform tips; (2) the short bifid forms; and (3) the 
