rODOCORYNE TROBOSCTDEA. 331 



In a note to his account of Slj/Iadis {Podocoryne) fuckola, contained in liis ' Literal Fauna 

 of the Mediterranean/ Sars describes under the name of Fodocuryne Ticbidarice a species whicli 

 he discovered on the Norwegian coast, where it occurs in abundance on the stems of Tabidaria 

 indivisa from a depth of between tliirty and forty fiithoms. Tiiere is nothing, however, in Sars' 

 description of this species to distinguish it from Podocoryne car/tea. 



3. Podocoryne proboscidea, Hincks. 



Podocoryne proboscidea, — Hincks, Brit. H\'dr. Zoopli., p. 317, pi. xxiii, fig. 1. 



TROPHOSOME. — Hydrantus " tall and rather stout, with a very long and some- 

 what columnar proboscis, and with about fourteen tentacles, some of which are tall 

 and erect, and others short and borne at right angles to the body." " No apparent 

 difference between the prolific and barren " hydranths. 



GONOSOME. — GoNOPnoRES "forming a large collar round the polypite (hydranth) 

 at a short distance below the tentacles, disposed in two rows, and borne on small 

 tubercles;" plaxoblasts permanently attached, umbrella deep bell-shaped, with the 

 marginal tentacles in the condition of eight short conical processes, manubrium 

 surrounded by the mass of generative products very large, and projecting beyond the 

 codonostome. 



Colour. — Hydranths orange brown, with opaque-white proboscis ; manubrium of planoblast 

 (male) surrounded by its generative elements orange with purplish base. 

 Development of Gonosome. — September. 

 Habifat. — On Laniinaria roots and the stones in rock pools. 

 Bathymetrical distribution. — Laminarian zone. 

 Locality. — llfracombe. Rev. T. Hincks. 



Podocoryne jjroboscidea is stated by j\Ir, Hincks to be a larger species than P. earnea, and 

 to be at once known by its long, cylindrical, and very conspicuous proboscis, Avhich has the 

 appearance of being fluted down the sides. The planoblasts develope their generative elements 

 while yet attached to the trophosome, and, in accordance with the general rule in such cases, 

 appear somewhat arrested, the marginal tentacles presenting the form of small tubercles. Hincks 

 regards this condition of the planoblasts as depending on the season of the year during which 

 they are produced, and believes that, if observed in an earlier month, they would be found to be 

 of the usual form. I cannot see, however, any evidence in favour of this view, and must regard 

 the conditiiMi in which Hincks has witnessed the gonosome in the present species as its constant 

 one. 



jVo observations were made as to the nature of the conunon hydrorhizal expansion, and it is 

 taken for granted that it belongs to the podocorynal type. 



