POLYCH^ETA OF THE L.M.B.C. DISTEICT. 263 



and chitinous in structure. Length about 3 to 5 cm. 

 Animal about the same length. 



This species while agreeing in all other essential details 

 with the previously known British representative of this 

 genus, Dasychone dalyelli, Kolliker (the Sabella bombyx 

 of Johnston) is sharply differentiated by the shape of the 

 dorsal processes. A similar difference marks it off from the 

 Neapolitan D. lucullana with which species Mr. Gibson, 

 in the previous local list erroneously identified the present. 

 In both D. dalyelli and D. lucullana, which I fancy will 

 be found to be one and the same species, the dorsal append- 

 ages have the form of elongated sublinear processes slightly 

 dilated at the apices — giving them a graceful club-like 

 form— totally different from the broad spathulate append- 

 ages of D. herdmani. This latter form approaches more 

 closely to that seen in D. infarcta, (Kroyer), but Kroyer's 

 species has no eye-spots. 



In one specimen I noticed with interest a similar 

 varietal departure from the normal arrangement of the 

 branchiae such as I elsewhere note concerning Sabella 

 pavonia. In the individual I refer to, the left tuft of bran- 

 chial filaments was much larger than the right — containing 

 33 filaments for the other's 16. 



* Amphicora (Othonia) fabric ia, (Muller). 



It is to the courtesy of Mr. C. H. H. Walker that I am 

 indebted for having my attention directed to this tiny tube 

 builder as an inhabitant of this district. It is fairly num- 

 erous attached to the surface of seaweed, &c. at the 

 extremity of Egremont slip — than which no more prolific 

 hunting-ground exists in the Mersey whenever the Ferry 

 authorities for even a short period cease from troubling 

 about repairs. A . fabricia is at times met with free — 

 without trace of any protecting tube — crawling about 



