POLYCH^TA SEDENTARIA OF THE FIRTH OF FORTH. 643 



setae, proximally a large number of short thick setae bifid at the apex; the 

 latter are present only in the first 10-15 somites, not in the others. Among the 

 dorsal bristles in the middle part of the body are some 2-pronged at the end 

 (PI. XXXVIII. fig. 8). 



Fam. Cirratulidje, Vict. Carus. 



Body round, parapodia near the ventral surface, the notopodia separated by 

 a wide dorsal region. Parapodia themselves not prominent, with simple chaetse 

 and acicula. Tentacular filaments in a transverse row on the dorsal surface 

 near the anterior end. A pair of branchial filaments on several of the somites. 

 Head long and conical. 



Cirratulus cirratus, Malmgren (O. F. Miill.). 



Cirratulus borealis, Lam., Anim. s. Vert., v. p. 302 ; Oersted, Annul. Dan. 

 Consp., p. 43; Groenl. Annul. Dorsibr., p. 54; Grube, Fam. Annel., 

 p. 67; Johnston, Brit. Mus. Cat., 1867, p. 210. 



Lumbricus cirratus, Miill.. Zool. Dan. Prodr., p. 214. 



Cirratulus cirratus, Malmgren, Ann. Polychaeta, p. 205 ; M'Intosh, Fauna 

 of St Andrews. 



Transverse series of tentacular filaments on 1st somite behind the buccal; 

 this is also the 1st setigerous somite. Buccal somite with two constrictions. 

 Branchial filaments on the body few and scattered, and their origin separate 

 from the base of the notopodium. 



There is no doubt that the species we have here is identical with Johnston's 

 C. borealis. It-is equally certain that it is the same as the C. borealis, Lam., of 

 Oersted; and as both Johnston and Malmgren affirm that Oersted's name 

 designates the same worm as Lumbricus cirratus, Muller, we cannot understand 

 why Malmgren (Annulata Polychaeta) expresses a doubt as to the identity of 

 Johnston's C. borealis with his own C. cirratus, Muller. 



Habits. — Common on the shores of Granton Quarry and on the shore in the 

 neighbourhood. Found usually extended beneath stones which are partially 

 buried in rather soft muddy ground. 



There has been considerable uncertainty among authorities as to the char- 

 acter of the portion of the body in this worm which is anterior to the con- 

 spicuous transverse series of filaments. In front of the segment which bears 

 the latter there are two constrictions, and in front of the most anterior of these 

 projects the blunt-pointed praeoral lobe, which bears a pair of transverse rows 

 of eyes. Johnston counts the part between the eyes and the 1st annulation 

 as the 1st segment ; thus, according to him, the thicker tentacular filaments in 

 transverse series arise from the 4th segment. Oersted takes in Johnston's 1st 

 segment as part of the praeoral lobe, and states that the branchial filaments arise 



VOL. XXXIII. PART. III. 5 B 



