262 Dr. W. C. Mcintosh on the Annelida 



be said of NycMa cirrosa^ Pall. Tlie specimens of the latter 

 have somewhat rougher scales, and a tendency to a longer and 

 more slender tip in the ventral bristles than the British forms. 

 The latter feature is carried to a characteristic degree in NycMa 

 Amondseni, Mgrn., a northern species (not yet discovered in 

 British waters) rather plentiful in the collections. In this 

 form the head differs from that of N. cirrosa chiefly in the 

 smaller size of the eyes, especially the posterior pair. The 

 dorsal cirri are longer ; but the dorsal bristles are similar, ex- 

 cept, perhaps, that the contrast between the shortest and the 

 most elongated is better marked. The ventral bristles are 

 much more attenuated at the tips throughout ; and the smooth 

 portion, while little longer in the superior series (though, of 

 course, much more slender), becomes remarkably elongated in 

 the central and lower groups. A specimen of Selenium poly- 

 noes, Kroyer, was attached to the ventral aspect of a foot. 



Eunoa (Erstedi, Mgrn., 



occurred on Orphan Bank, and is distinguished roughly 

 from the more common E. nodosa, Sars, likewise in the collec- 

 tion, by the brighter brownish coloration in spirit, by the much 

 rougher scales, and the greater length of the dorsal bristles. 

 Malmgren's figures are much in need of amendment, especially 

 his representation of the dorsal bristles. 



Eagisca rarispina, Sars, var. occidentalis *. 



At first sight, and with an imperfect specimen without 

 scales, the form was considered closely allied to Polynoe floc- 

 cosa, Sav. ; but further examination of more perfect examples 

 showed tlie true character of the annelid. The scales are 

 distinguished by the remarkably long, brownish, soft papillas 

 posteriorly, and have many parasitic Loxosomce and other 

 structures. The cilia on the dorsal cirri are much less nume- 

 rous and shorter than on the species from the ' Porcupine ' 

 [Eagisca Jeffreysii) ; and the ventral cirri have a few short 

 papillee : the latter are stated by Malmgren to be subglabrous. 

 The dorsal bristles (PI. IX. fig. 1) are rather long, tapered 

 towards the point, and with somewhat fine rows of spikes. 

 The smooth part at the tip is of moderate length ; but it often 

 seems longer than it really is, since the rows of spikes pass 

 far up ; in certain views it is also slightly dilated, so as to 

 give a character to the bristles. The superior ventral bristles 



* The generic names in this paper are merely provisional, as very con- 

 siderable changes will be necessary throughout the whole series of the 

 Annelida in this respect. 



