POLYCH^ETA SEDENTARIA OF THE FIRTH OF FORTH. 671 



first nine of which belong to the thorax, and the last four to the 

 abdomen. All are setigerous except the first and last. In the thorax the 

 notopodial setae are capillary, and the neuropodial setae uncinate. In the 

 abdomen the arrangement is reversed, the notopodial setae being uncinate, 

 and the neuropodial setae capillary. Branchiae with three branches in each 

 tuft. Eye spots two, towards the sides of the first somite. A large labium or 

 under lip bounds the mouth ventrally. Last somite closely united with that 

 which precedes it, with a sort of post-anal lobe projecting backwards dorsally 

 to the anus, and bearing two eye spots. Capillary setae limbed on one side, 

 curved, and much drawn out at the tip. Uncini with a long curved manubrium, 

 and several teeth on the vertex. 



Amphicora Fabricia (Mull.). 



Tubularia Fabricia, Prodr., Z. Danicae, n. 3066. 



Othonia Fabricia, Johnston, Cat. Brit. Mus. 



Amphicora sabella, Ehrenberg, Mitth. Ges. Nat. Freunde in Berlin, 1866, 



p. 2 (Heligoland). 

 Amphicora Fabricia, Malmgren, Annulata Polychaeta, p. 225 ; M'Intosh, 



Fauna of St Andrews. 

 Fabricia quadripunctata, Claparede, Etudes Anat. Annel. Turbel. etc. in 



Mem. Soc. Phys. et Hist. Nat. Geneve, xvi. 1. 



Occurs abundantly on the roots of Fuci growing on shale rocks at Granton. 

 Colour reddish, length three or four lines. Inhabits a slender tube of mud two 

 or three times the length of its body. When a few of these tubes are teased 

 up in a watch-glass the minute worms come crawling out, wriggling along 

 very actively, and moving usually tail first. This is the more curious, when we 

 observe the post-anal lobe and eye spots described on the last somite. 



Fam. Eriographidea, Malmgren. 



Genus Myxicola (Koch), Grube. 



Arippasa, Johnston, Cat. Brit. Mus. 

 Eriographis, Grube, Fam. cl. Annel. 



Is described by Malmgren as follows :— Body round, somewhat thick, giving 

 off a quantity of mucus ; somewhat attenuated towards each end, more so 

 posteriorly than anteriorly ; anus terminal ; collar none. First somite pro- 

 duced inferiorly into a very short triangular acuminate process, pointing for- 

 ward. Ventral furrow not conspicuous, but continued into the dorsum of the 

 anterior part of the body. Anterior part of the body composed of eight somites, 

 with slender capillary setae with a narrow limb, and a few elongated uncini, 

 with sub-rostrate apex beneath the minute fascicles of setae. Posterior part 



