384 W. C. M'INTOSH ON BEITISH ANNELIDA. 



and delicate spinous region with a bifid and scarcely curved tip, careful examination 

 being necessary to detect the slender secondary process (PI. LXIX. fig. 5). The tips 

 become stouter though shorter inferiorly, and the bifid extremity more apparent, the 

 secondary process proceeding halfway upward in the stronger forms. This process 

 becomes a mere speck and finally disappears in the lowest bristles. One of the 

 stoutest forms (three or four of which spring from the region of the spine) is drawn 

 in PL LXIX. fig. 6. The spinous region has its upper third even narrower than that 

 immediately behind the hook at the tip — a peculiarity not often seen. 



Haemothoe haliaeti\ n. s. Dredged in the Minch by Dr. Gwyn Jeffreys. A frag- 

 ment of the posterior end of the worm was obtained ; and the feet are the only parts 

 that can be described at present. It is a species of some size. 



The dorsal branch of the foot bears a series of rather slender slightly curved bristles 

 with conspicuous rows of spines (PI. LXIX. fig. 7). Such bristles, when viewed 

 antero-posteriorly, present a much narrower aspect than when seen in profile. The 

 arrangement of the spinous rows is alternate, as in the ventral bristles. The superior 

 ventral bristles have elongate spinous portions and slender tips (PI. LXIX. fig. 8). At 

 first the bifid tips are almost straight or very slightly curved, but they soon become 

 more characteristic (fig. 9). The alternate rows of prominent spines are conspicuous in 

 both figures. The fades of the tip is even more characteristic in the inferior series 

 (PI. LXIX. fig. 10). In the superior group the secondary process is nearly straight; 

 but in the others it bends outward at the tip. 



The inferior cirrus is slightly enlarged at the base, slender and filiform superiorly, 

 and furnished with rather long papillae, sparsely distributed. 



The species is at once distinguished from Polyno'e fioccosa by the structure of the 

 bristles, both dorsal and ventral, and by the presence of rather long papillae on the 

 ventral cirrus. 



Harmothoe maephys^, n. s. From the galleries of Marphysa sanguinea in Guernsey, 

 and chinks of the rocks, Polperro (Brit. Mus.). 



Length about three quarters of an inch. Bristle-bearing segments thirty-one ; but the 

 posterior region is in process of reproduction. Of a pale brownish hue, inclining to buff', 

 with a red patch on the head and a purplish one (due to the proboscis) behind ; a faint 

 median line from end to end ; cirri pale brownish, pellucid, the two caudal styles being 

 darkest. The under surface is pinkish, with a broad streak of pale carmine in the 

 centre. 



The head is rather elongated from before backward, and rounded in front. Eyes 

 small ; the anterior pair widest apart and situated in front of the middle line at the 

 edge of the red patch on the head. The posterior pair lie in front of the posterior 

 ' Named after Dr. Gwyn Jeffrey's yacht ' Osprey.' 



