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 ofi" 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 1^ inch long, and apparently eyeless (in spirit). The scales 

 are furnished with a limited number of papillae, 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 papillae on the truncated exterior border is about ten (PL LXXII. 

 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 papillae 

 on the surface. Very large examples of S. boa from Herm have the same relations be- 

 tween the various papillae of the scales. 



The superior division of the foot bears about three papillae 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 papillae 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 (PI. LXXIII. 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 



