388 "W. C. M'ENTOSH ON BRITISH ANNELIDA. 



The species seems to be somewhat elongated (three quarters of an inch), those 

 hitherto observed being easily discriminated in spirit by a brownish black band which 

 commences behind the head, and continues along the centre to the posterior end. It 

 is widest over the oesophageal region, and has a separate line (interruption) at each 

 segment. 



The head has a similar structure to that of Hermadion peUiicidum, Ehlers (formerly 

 described as British'), the eyes being placed close together on each side, while they are 

 wide apart transversely; the anterior pair appear to have "lenses" — that is, show a 

 whitish centre. The tentacle is long, smooth, dilated below the filiform terminal 

 appendage, and minutely dotted under a low power. The antennae are short and 

 slightly enlarged below the long filiform tip. The palpi are quite smooth. The 

 tentacular and dorsal cirri are also smooth, and slightly enlarged below the filiform 

 extremity ; they are much shorter than those of I£. pelUicidum. The ventral cirri, 

 again, are rather slender, quite smooth, and reach about the tip of the fleshy part 

 of the foot. The scales are very delicate and translucent, and show minute rounded 

 papillae, sparsely placed on their exterior border and neighbouring surface. 



The dorsal bristles are translucent and somewhat smaller than in H. jjellucidum, the 

 spinous rows toward the tip being much less prominent, and covering a shorter region 

 of the bristles ; moreover the tip is more rounded than in H. pellucidum, and the 

 notch is distal rather than lateral. One of the longer forms is represented in PL LXX. 

 fig. 4, and one of the shorter (which exhibits the spinous rows more clearly) iu fig. 5. 

 The ventral bristles are also translucent, with the terminal portion gently narrowed 

 from the basal collar of spines upward (PI. LXX. fig. 6). The tip, which is more 

 obtuse than in H. pellucidum, turns bluntly round toward the spiked side, and ends in 

 a small beak ; then an oblique edge occurs between this and the secondary process, 

 which is lateral. The whole characteristically differs from E. pellucidum. 



Halosydna GELATiNOSA, Sars. Generally distributed from Shetland to the Channel 

 Islands. The bristles are figured in Trans. R. S. Edin. vol. xxv. pi. 15. f. 6. 



Enipo kinbergi, Mgrn.1 Fragmentary and half-digested specimens of a very elon- 

 gated form are not uncommon in the stomachs of cod and haddock caught off St. 

 Andrews Bay. The condition of these forbids a minute account. Only one had a 

 dilapidated head ; and in this no eyes remained. The largest fragment had upward 

 of fifty segments, and it was far from being complete. The dorsal cirri are quite 

 smooth. The feet, like those of E. kinbergi, are prominent; and if, as I am disposed 

 to think, the species is to be referred to the latter, Malmgren's figures require improve- 

 ment. The dorsal bristles are very minute, slender hairs, finely serrated (PI. LXX. 

 fig. 7). The ventral are of two kinds, viz.: — that indicated by Malmgren, and correctly 

 ' Trans. E. S. Edin. vol. xxv. p. 408, pi. xv. f. 2, a, h. 



