15 



This species is generally more branched than the branched 

 variety of T. Larynx, and usually in an alternate maniaer. 

 The branches do not rise from the trunk at such an obtuse 

 angle as in the last ; the tubes are smaller, more dense, of 

 a deeper colour, and do not present such decided rings as 

 T, Larynx. The polype heads are red, mouth conical, with 

 a single circle of tentacula. Ellis' figure in his "Essay on 

 Corallines" is very good and characteristic. 



T. RAMEA. Arborescent, stem and branches formed of 

 agglutinated filiform tubes, irregularly branched. Polypes, 

 with a single row of tentacula. 



Tubularia Ramea, Johnston's Brit. Zooph , p. 117, pi. 5, 

 figs. 1 and 2. 



Bab. On Pinna Ingens, south of the Deadman point. 



The appearcnce of this species is so remarkable, as to ren- 

 der a fair specimen difficult to be confounded with any other. 

 It is very bushy and very closely resembles a miniature tree. 

 I have a fine specimen from eight leagues off the Deadman 

 point, eight mches high. It is very stout, rigid and of a dark 

 brown colour. The chief branches and trunk are composed 

 of many agglutinated tubes, which decrease in number as the 

 branches divide ; the ultimate or terminal branches are 

 composed of a single tube with one or two annulations at the 

 origin of each. I have not observed the polype* but they 

 are said to have a single row of white tentacula. The roots 

 are matted together like a coarse sponge. 



SERTUL ARIADNE. 

 Polypes gemmiparous, the gemmules enclosed in ovarian 

 persistent vesicles, scattered on the polypidom. 



THOA, Laniouroux. 

 Generic Character: Polypidoms rooted, arborescent; the 

 stem composed of aggregated sub-parallel capillary tubes; 

 the branches alternate, spreading hilariously; cells tubular, 

 indistinct, alternate; ovarian vesicles irregularly scattered. 

 Polypes hydraform, scarcely retractile within their cells. 



HERRING-BONE CORALLINE. T. Haleciiia. Cells 

 oval, vasiform, contracted near the mouth; mouth subier- 

 minal and somewhat patulous. 



Corallina scruposa pennata, cauliculis crassiusculis rigidis, 

 Raii Synop., vol. 1, p. 36. Herring- bone Coralline, Ellis' 

 Coral., p. 17, no. 15, pi. x. Sertularia halecina, Ellis and 

 Solander's Zooph., p. 46, no. 15. Tutton's Lin., vol. 4, 

 p. 678. Stewart's Elem., vol. 2, p. 442. Fleming's Brit. 

 An., p. 542. Templeton in Mag. Nat. Hist., vol. i), p. 468, 



