13 



TUBULAR! A, Linnasus. 

 Generic. Character: Polypidom rooted, more or loss planf- 

 like, horny, tubnlar; no cells. Tlie polypes protriulinir at 

 the end of the brandies, and not retraclile. 'J'he liead is 

 crested with one or two rows of lentacula. 



* Ttihes nndivided. 



OATEN-PIPE CORALLINE. Tuhulnria Tndivisa. Tubes 

 clnstered, simple, cylindrical, narrowed and interwoven at 

 the base. The head is clustered with one or two rows of 

 tentacula. 



Adianti aurei minimi facie planta Marina. Ray's Synop,, 

 vol. 1, p. 31., no. 4. Remarkable sea plant, LInvyd's Phil. 

 Trans, Tubular Coralline, like oaten pipes, Ellis' Corallines, 

 p. 31, pi. 16, fig, c. Tubiilaria indivisa, Lamonroux's Cor. 

 Flex., p. 230. Blumenbarh's Man., p. -272. Turton's Lin., 

 vol. 4, p. 66G. Stewart's Elem,, vol. 2, p. 437- Flem, Brit. 

 An,, p, 552. .Tohnston's British Zoophytes, p. 113, pi. 3, 

 figs. I and 2. Solander and Ellis' Zooph., p, 31. 



Hah. Attached to stones from deep water. Polperro, 

 West Combe, Lansallos ; rare. On the Gwiuges rocks, near 

 Mevagissey, cotnn>on, Mr Peach. 



This, in particular situations, is very common, as on the 

 Gwinges rocks near Gorran and the neighbourhood, and in 

 deep water about three miles from the shore, Polperro. 

 The tubes are simple from the roots to the terminations. 

 The height of the tubes varies from two to fourteen inches, 

 and they are about the tenth of an inch in diameter. At the 

 roots they are frequently twisted and convoluted on each 

 other, but they soon rise simple and undivided. The centre 

 is filled with a soft granular pulp which passes np each tube 

 and terminates in the polypes. The polype heads are red and 

 incapable of being \vithdr:iwn into the tubes. The mouth is 

 produced into a conical ehivation, and around is a circle of 

 red tentacula; inferior to this circle is another in which the 

 tentacula are much longer than in the one above. Below this 

 last circle, are produced the reproductive gemmules. Tlio 

 young sometimes pullulate from this part, and when sepa- 

 rated fiom the parent, they travel to some other spot by 

 means of their tentacula, till having selected a proper situa- 

 tion, they fix themselves by their base. From this spot they 

 never afterwards move; but a horny ring is formed round 

 tiie base, and increasing as the poiypidora grows, forms the 

 tubes of the perfect animal. Somelimes, a few specimens 

 are found sparingly branched. 



■yyiNDPIPE CORALLINE. T. Larynx, Tubes clustered, 

 ringed at intervals; polypes with a duuble row of tentacula. 



B 



