POLYCILETA OF PLYMOUTH. 609 



at extreme low water [Hodgson, Joum. M.B.A., vol. 6, 1900, p. 2-il) : 

 less frequently in dredgings from the Sound. 



ExMOUTH. Not uncommon on the shore at Orcombe Rocks 

 (Joum. M.B.A., vol. 6, 1902, p. 318). 



Torquay. Occasionally found on all the beaches. Numerous 

 specimens on a large buoy in Torquay Harbour {Elwes, Joum. M.B.A., 

 vol. 9, 1910, p. 59). 



Gattyana cirrosa (Pallas) : Mcintosh, Mon. Brit. Ann. I. 2, 1900, 

 p. 285. 



Plymouth. In dredgings from the neighbourhood of the Eddy- 

 stone {Hodgson, Joum. M.B.A., vol. 6, 1900, p. 242). Yealm Sand Bank 

 and east shore, commensal in tubes of Amphitnte Johnstoni. 



Salcombe. Found on the shore living in the tubes of Ampliitrite 

 Johnstoni on the Salstone, south of Halwell Point and near the 

 mouth of Salcombe Harbour (under Marine Hotel) {Hodgson, Joum. 

 M.B.A., vol. 6, 1900, p. 190). 



EuNOA NODOSA (M. Sars) : Mcintosh, Mon. Brit. Ann. I. 2, 1900, 

 p. 291. 



One specimen from the stony ground off Prawle Point, in 30 fms. 

 {Wddon, Joum. M.B.A., vol. 5, 1899, p. 478). 



Lagisca extenuata (Grube) : Faiivel, Result. Camp. Sci. Monaco. 



Fas. XLVI. Annel. Polych. 1914, p. 62. Mcintosh, Mon. Brit. 



Ann. I. 2, 1900, p. 298 as L. floccosa (Savigny)=L. fropinqua 



Malmgren. 



Plymouth. Between tide-marks and in dredgings throughout 



the whole area to 30 fms. {Hodgson, Joum. M.B.A., vol. 6, 1900, p. 247 as 

 L. floccosa. At many stations S.S.W. of the Ecldystoue to about 

 50 fms. {Crawslmy, Joum. M.B.A., vol. 9, 1912, p. 340, as L. floccosa). 



Torquay. Fairly common under stones {Ehves, Joum. M.B.A., vol. 9, 



1910, p. 59). 



Note. Two varieties of this species occur in the Plymouth 

 district. (1) A Httoral and inshore variety, in which the elytron 

 bears on its edge a few minute scattered cilia only, whilst the sur- 

 face is covered with small tubercles slightly conical in shape and of 

 fairly uniform size (a few being slightly larger than the rest) and has 

 a number of large, brown, globular papillae near the posterior border. 

 (2) A deeper water variety found on the dredging and trawHng 

 grounds from 20 to 50 fms., in which the elytra bear on their edges 

 a continuous row of minute cilia, almost spherical in shape. The 

 surface of the elytron is covered with small tubercles as in the 

 littoral variety, but scattered over the surface both towards the 

 centre and especially towards the exterior and posterior borders 

 a number of the tubercles are greatly enlarged, so that they stand 

 out as strong conical spines. Those near the posterior border are 

 the largest and their ends may appear rounded and swollen, but 



