202 PLYMOUTH MARINE IXVEnTEBRATE FAUNA. 



[ Discomedusae — co«W. : Alcyonaria ] 

 Ulmaridae. 



AuRELiA AURITA, Laiuarck : E. Hacckcl, Syst. Medus., Denkschr. med.- 

 natuiw. Ges. Jena, vol. i, p. 552. 



i\Iost abundant in the estuaries in sprin^,' and summer; R. Tamar; 

 Hamoaze ; Yealm \{.\ carried out into the Channel towards the 

 end of the summer (e.j.a.) : Saltash (e.t.b.). 



The ephyra? appear in February and may be taken iu shoals 

 during the first fortnight of March, they metamorphose towards 

 the end of the month and begin to disappear. The young meduste 

 reappear towards the end of May and reach their maximum 

 abundance during June (w.G.). 



Pilemidse. 

 Rhizostoma OCTOPUS (Linnteus) : E. Hacclcd, Syst. Medus., Denkschr. 

 med.-naturw. Ges. Jena, vol. i, p. 593 (as Pilema). 

 Occasionally (s.p.). 



ALCYONARIA. 

 CorDulariidse. 

 Sarcodictyon CATENATA, Forbes : W. A. Jlenlinan, Proc. Liverp. Biol. 

 Soc, vol. IX, p. 163, fig. 



Eddystone Gds.; the red form is found, often in abundance, on 

 old shells, and is generally most })lentiful on clean shell-gravel 

 (e.j.a., s p.) : Stoke Pt. Gds. ; Rame-Fddystone Gds. ; etc. (s.p.). 



Alcyonidae. 



Alcyonium DIGITATUM, Linuicus : >y. J. Hickson, (.^)uart. Journ. Micr. 

 Sci., ser. 2, vol. xxxvii, p. 349, fig. 



Generally present in dredgings from the Sound and outside 

 grounds, but the colonies are usually small (r.a.t., s.p.) : Promenade 

 Pier, large colonies are occasionally common, at extreme low water 

 (E.J.A., R.A.T., S.P.): Eddystone Gds., large colonies abundant on the 

 fine sand of the ' Outer ' Trawling Gds, and S. of the Eddystone, 

 attached to valves of Cardium cchinatinn, etc. (e.j.a.). 

 Breeding : Oct. ; Jan. (r.a.t.) ; Nov.-Feb. (w.G.). 

 Alcyonium glomeratum (Hassall) : >S'. J. Ilidson, Quart. Journ. Micr. 

 Sci., ser. 2, vol. xxxvii, p. 353, fig. 

 Mewstone Ledge (r.a.t.). 



Alcyonium palmatum, Pallas : G. v. Koch, Mitth. Stat. Neapel, vol. ix, 

 p. 663, fig. 



Mewstone Ledge (s.p.) : 3 m. S.E. of the Mewstone (e.j.a.). 



Plexauridae. 



EuNiCELLA Cavolini: G. V. Kocli, Fauna Flora Neapel, vol. xv, p. 58, fig. 



More or less connnon everywhere on rocky ground, 10-25 fms. 



(s.p.) : Mewstone Ledge, very common (e.j.a., r.a.t., s.p.) : Queen's 



Gd., rare (r.a.t., s.p.) : Rame-Eddystone Gds. ; Stoke Pt. Gds. (s.p.). 



Virgulariidae. 

 Yirgularia miuaiulis, O. F. Miiller: A. M. Marshall cO W. l\ Marshall, 

 Rept. Penuatulida Oban, p. 51, fig. 



Single spec, Nr. Eddystone (w.p.m.): 6 m. W.S.W. of Penlee Pt. 

 (R.A.T.1) : Stoke Pt. Gds. (s.p.). 



