DACTYLOPUS. Lis 
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 35th 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 
Canthocamptus Stromu, 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 Hast 
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. H. C. 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. II. H 
