DACTYLOPUS. 113 



moderate length and imperfectly ringed (fig. 13 a), their 

 structure appearing under high powers of the micro- 

 scope somewhat like that of wool or human hair. 

 Length - 2 - 5 -th of an inch (1 mm.). 



This is a widely distributed and very distinct species, 

 with a slender, tapering abdomen, which in preserved 

 specimens is usually only slightly bent upon the 

 thorax ; the colour is usually pale or golden yellow, 

 and the animal is frequently filled with small oil 

 globules, a character often sufficient to distinguish it 

 at once amongst other species. Some doubt must 

 rest upon the identification of this with Dr. Baird's 

 Cantlwcamptus Stromii, but as I am unable to suggest 

 any other species to which Dr. Baird's description 

 might better apply, I follow the nomenclature adopted 

 by Dr. Claus and Mr. Norman. 



The habitats given by Dr. Baird are : " Sea-shore 

 at Cockburnspath, Berwick, &c., amongst coralline and 

 seaweeds, 1835. Dover, North Foreland, September 

 1849." No one, however, so far as I know, has found 

 the species in these localities since Dr. Baird, nor has 

 it occurred (except in one instance) in any of the 

 numerous gatherings from different parts of the East 

 Coast which have passed through my hands. Mr. 

 Norman has recorded it from Lerwick ; I have speci- 

 mens taken at Ventry Bay, Valentia, and Killybegs 

 Harbour, Ireland, by Mr. E. 0. Davison ; and it has 

 been dredged by Mr. Robertson and myself off Red- 

 cliff, Yorkshire ; off Port Dinlleyn, North Wales ; in 

 Clew Bay, and amongst the Scilly Islands, where also, 

 as well as in the Frith of Clyde, near Cumbrae, we 



VOL. n. H 



