POLYCH^TA SEDENTARIA OF THE FIRTH OF FORTH. 663 



Amphitrite cirrata, Mitller. 



Terebella cirrata, Montagu, in Linn Trans., xii. p. 342 ; Johnston, Cat. Brit. 



Mus. ; Leuckart, Archiv f. Naturges., i. 1849. 

 Amphitrite cirrata, Miiller, Prodr. Zool. Dan. ; Malmgren, Nordiska 



Hafs-Annulater, p. 375. 



Two or three specimens obtained in the dredge on one occasion, on the 

 Eost, north of Inchkeith, October 29, 1886. 



Specific Diagnosis. — Chsetiferous tubercles in 17 segments. Prostomium 

 behind the tentacles without lateral lobes. Branchia with very short stem, 

 from which spring a number of elongated filaments nearly equal in length, and 

 spirally curled. A minute conical papilla in six segments, the 3rd chsetiferous 

 to the 9th. Ventral scutes, 10 in number, rectangular in shape; tube of mud 

 or clay (PI. XLIII. fig. 24). 



Terebella Danielsseni, Malmgren. 



T. Danielsseni, Mgn., Nordiska Hafs-Annulater; Stockholm Forhand- 

 lingar, 1865. 



Specific Characters. — Segments short ; branchiae flabelliform, decreasing 

 much in size posteriorly, branching dichotomously from a short stem ; ultimate 

 twigs very short. Two secondary teeth on the uncinus, one distinct the other 

 minute ; the manubrium of the uncinus with an entire curved outline at the 

 corner beneath the teeth {vide PI. XLIII. fig. 25). 



Middle Bank, opposite Granton, 6 fathoms, August 11, 1886 ; only one 

 specimen dredged. 



Genus Lanice, Malmgren, 1865. 



The points which distinguish this genus from Terebella are not very 

 marked. Both have 17 pairs of notopodial fascicles ; both have 3 pairs of 

 arborescent branchiae : the principal difference is the shape of the buccal 

 somite, which in Lanice is produced anteriorly so as to form a large under lip, 

 which is absent in Terebella. Eye spots are present in Terebella, absent in 

 Lanice. In Lanice the 2nd post-buccal somite has a large vertical lobe on each 

 side, and the glandular scuta ventralia form a continuous area, of a bright red 

 colour in the living animal, instead of forming a metameric series. 



