PLYMOUTH MARINE INVEKTEBRATE FAUNA. 277 



[ Tectibranchiata— CO/;/'/. : Nudibranchiata ] 



CoLPODASPis PUSILLA, M. Sars : ir. Garstang, Proc. Zool. Soc, vol. 1894, 

 p. 664, fig. 



On rough ground, about 2 m. S. of the ]\Iewstone, Feb. 1893 (w.G.). 



Aplysiidae. 

 Aplysia PUNCTATA, Cuvier: W. Garstang, Journ. Mar. Biol. Assoc, ser. 2, 

 vol. i, p. 401. 



Queen's Gel, rare; Cattevvater; CawsandP).; lieny liks. ; Yealm R., 

 moderately common in dredgings, very common at times on the 

 shore, especially in May and June; Yealm Est., small specs, not 

 uncommon on the Zostera (r.A.T.) : E. end of Whitsand P)., in 

 quantity beneath seaweed on rocks (w.H.). 



Breeding: Apr.-July (R.A.T.) : June-Oct. (w.G.): maximum, 

 May-June (a.j.s.). 



Pleurobranchidse. 

 Pleurobranchus plumula (Montagu): /. G. Jeffreys, Brit. Conch., vol. v, 

 p. 11, fig. 



Jennyclift' B. (a.j.s.) : Wembury B., on the shore ; S. of the 

 Mewstone (w.G.). 



OscANius membranaceus (Montagu): /. G. Jeffreys, Brit. Conch., vol. v, 

 p. 10, fig. (as Flcurohreinchus). 



Not uncommon on the trawling grounds (w.i.B., S.P.): the Sound, 

 unusually plentiful, especially in Milibay Ch. and the Hamoaze, 

 1893; young specs, common swimming at the surface in the Sound, 

 Sept. 1892 (w.G.): Cattewater and Yealm E., very occasional (R.A.T.). 



Runcinidse. 

 Euncina coronata (Qnatrefages): J. G. Jeffreys, Brit. Conch., vol. v, p. 15, 

 fig. (as R. H(incoehi). 



Tide-pools below Hoe, very abundant Apr. 1889, small specs, in 

 Sept. (w.G.) : Eum B. (r.a.t.^) : among corallines from rock-pools 

 in the Sound ; Yealm E. (w.i.b.). 



NUDIBRANCHIATA. 

 Hermaeidse. 

 HerMtEA bifida (Montagu) : J. Alder & Hancock, Monogr. Brit. Nudibr. 

 Moll., p. 53, fig. 



St. Peter's Pt., Hamoaze, single spec, on DeJesseria (w.G.) : West 

 Entrance of Sound, in townet, single spec; Cawsand B., single spec 

 (w.i.B.) : off Penlee Pt., small spec, in townet (s.P.). 



HERMiEA dendritica (Alder & Hancock): /. Alder & Hancoch, Monogr. 

 Brit. Nudibr. Moll., p. 53, fig. 



Drake's I., two on Bryopsis (w.G.): inside Bovisand Pier, single 

 spec (r.A.T.) : in Lab. tank on a stone from Bovisand B. (w.i.B.). 



Breeding: June (w.G.). 



Stiliger bellulus, d'Orbigny. 

 Cawsand B. (W.g.^), 



