672 MR J. T. CUNNINGHAM AND MR G. A. RAMAGE ON THE 



of body of numerous subannular somites, with fascicles of setae disappearing 

 and very small uncini very shortly hooked, with a much elongated tooth on the 

 vertex, very numerous, and forming a transverse series from the dorsum round 

 the ventral surface, both above and below the fascicle of setae. Branchiae 

 forming a semicircle on each side, almost completely connected by membrane ; 

 rays filiform, disposed in two rows internally. Eyes none. Two very short 

 broad compressed rounded tentacles surrounding the mouth on each side. 



Myxicola Steenstrupi, Kroyer. 



Myxicola Steenstrupi, Kroyer, Dansk. Vid. Selsk. Fork, 1856, p. 17. 

 Myxicola Sarsi, Kroyer, loc. cit, p. 9; Sars, Christiania Vid. Selsk. Forh., 



1861, p. 130. 

 Myxicola Steenstrupi, Malmgren, Nordiska Hafs-Annulater, p. 409. 

 Arippasa infundibulum, Johnston, Cat. Brit. Mus. 



This species is not mentioned by M'Intosh in his Fauna of St Andrews. 

 We have dredged it on the Middle Bank on shelly ground on several occasions. 



Malmgren describes the specific characters as follows: — "Body of 45 to 70 

 somites, in the posterior part more or less distinctly biannulate, short in middle 

 of body, length equalling a fifth to a seventh part of the breadth. Branchiae 

 with from 15 to 22 branches on each side, equalling or slightly surpassing a third 

 part of the length of the body, with apex naked, involuted, tapered, edged by 

 membrane, almost equalling a fourth part of the length of the branchiae ; radii 

 of moderate length, very thin, tapered, nearly flexible." Colour dull greenish, 

 branchiae tinged with purple, especially towards the tips. Always found 

 enveloped in transparent mucous. 



Fam. Serpulidve, Malmgren. 



We have not minutely studied either the literature or the animals in this 

 family, but we believe the following account to be correct. 



Gen. Serpula, Lin., Philippi. 

 Serpula vermicularis, Linn. 



Serpula vermicularis, Linn., S. N., xii. p. 1266; Malmgren, Annulata 



Polychseta, p. 228 ; M'Intosh, Fauna of St Andrews. 

 Common in deep water. 



Genus Filigrana (Oken). 

 Branchiae with eight branches, two of which are expanded at their extremity, 

 and obliquely truncated, so as to form opercula. Tubes calcareous, very 

 slender, and adhering together in masses. 



