PLYMOUTH MARINE IX VERTEBRATE FAUNA. 199 



[ Leptomedusse — contd. ] 



Plumularia pinnata (Liniiifius): T. Rincks, Hist. Brit. Hydr. Zooph., 

 p. 295, fig. 



By far the most abundant Plumularian at Plymouth (c.C.N.) : 

 Millbay Ch. (e.j.a., r.a.t., s.p.) : JMillbay Dock, on piles ; Asia Sh. ; 

 Eum B , occasionally (r.a.t.) : common ; Duke Kk. ; Barn Pool ; off" 

 Mewstone (g.c.b.) : Puime-Eddystone Gds. (e.t.b. & r.a.t., «.p.) : Eddy- 

 stone Gds., generally distril)uted, particularly on the gravel W. of 

 the Eddystone, where it is usually attached to Chwtoptcrus tubes or 

 to other Hydroids (e.j.a.) : Yealm P. (e.j.a., r.a.t.). 



Asexual ' stoloniferous ' reproduction has been observed in Apr. 

 (c.C.N.). Gonophores in Apr. (w.G., r.a.t.): May (e.j.a., r.at.): June 

 (e.j.a.). 



Plumularia setacea (Ellis) : T. Hincks, Hist. Brit. Hydr. Zooph., 

 p. 29G, fig. . _, 



Common in the Sound; Hincks' branched variety is very common, 

 generally on Hrdivhondria imnicca (g.C.B.): Millbay Ch. and Pit, not 

 uncommon ; Millbay Dock, on piles ; Tinside, occasionally ; Asia 

 Sh., occasionally ; Pame-Eddystone Gds., on Chcvtoptcrus tubes 

 (r.a.t.) : Eddystone Gds., generally on other Hydroids or on Poly- 

 cha?te tubes (e.j.a.). 



Breeding : Feb.-June (w.G.). 



Plumularia similis, Hincks: T. Hiiu-l'n, Hist. Brit. Hydr. Zooph., p. 303, 



fig- 

 Common ; rocks below Lab. ; Jennycliff' B. (g.c.b.) : under the 

 Hoe; Bovisand B. ; Yealm P. (t.v.h.) : Church Peef, Wembury B., 

 very occasional ; Millbay Ch., occasional specimens (r.a.t.). 



{MEDUSA STAGE.) 

 Eucopidse. 



Agastra mira (Hartlaub) [Hydroid = ^. calkulata (Hincks)]: E. T. 

 Brou-ne, Proc. Zool. Soc, vol. 1897, p. 832., fig. 

 A single spec, in the Sound, Aug. 1897 (e.t.b.). 

 Obelia lucifera : E. Forhes, Monogr. Brit. Naked-eyed Med., p. 52, fig. 

 (as 'Thaumantias). 



Very plentiful, June 1892 (e.j.b.) : by far the most abundant 

 Leptomedusan in the Sound and outside, Sept. 1897 (e.t.b.), 



Obelia nigra: E. T. Brovmc, Proc. Irish Acad., 8er. 3, vol. v, p. 721. 



Common; 1898, very abundant Apr.-May ; 1899, abundant in 

 June (e.t.b.). 



TiAROPSis MULTICIRRATA (Sars) ; E. HaecM, Syst. Medus., Denkschr. 

 med.-naturw. Ges. Jenn., vol. i, p. 179. 

 Apr. 1895 (e.j.a.). 



EuciiiLOTA PILOSELLA (Forl)es) : E. T. Browne, Proc. Zool. Soc, vol. 

 189G, p. 484, fig. 



Plymouth (e.t.b., e.j.a.) ; common every sunnuer (w.G.). 

 Mitrocomella fulva: E. T. Broirii,; Ikrgens Mus. Aarb., vol. 1903, 

 No. 4, p. 17, fig. 



Single spec, off the Eddystone, May 1898 (e.t.b.). 



