270 POLYZOA INFFNDIBULATA. 



" Varietas flavicans in ulvis pra)sertim obvia, in qi;arum foliis im- 

 pressiones orbiculares relinquit. Si ramulis tenellis affixa sit, aut 

 circum illos convoluta, cylindrum s. annulum oblongum format, aut 

 duse oppositse annexaj ramulum inter se servant." 



The figures of Esper, quoted by Lamarck for bis T. orbiculus, re- 

 T^vesent Cellepora pumicosa ; and Blainville informs us tbat the speci- 

 men in Lamarck's collection is an arborescent, more or less branched, 

 spongy mass composed entirely of cells, and can only be a variety of 

 a Cellepora. It is unnecessary to point out the incongruity between 

 this and Lamarck's description, which is referable only to a true 

 Tubulipora, and suits the species before us remarkably well : " T. 

 subincrustans ; cellulis tubulosis in orbiculum hemisphpericum ag- 

 gregatis ; osculo subdentato." The orifice of the aperture being 

 sometimes, as Lamarck says, furnished with from one to three teeth, 

 and sometimes with none, is exact to T. hispida ; and the character 

 proves that the species can be no variety of T. verrucosa as Milne- 

 Edwards has conjectured. 



Old and dead specimens often have the appearance of the fossil 

 Favosites. 



''^ "" Base eloiioated or incrassated. 



3. T. PENiciLLATA, Stalled, the stalk cylindrical, expanding 

 into a round celluliferous head ; cells tubular with a plain even 

 aperture, R. Q. Couch. 



Plate XLVITI. Fig. 1, 2. 



Tubipora penicillata, Fuhric. Faun. Groenl. 429. Turt. Gmel. iv. 615. — Tubulipora 

 Fungia, Couch Zooph. Comw. 4G : Corn. Faun. iii. 107, pi. 19, fig. 3. 



Hah. " On shells and stones from deep water, common ; from 

 the Eddystone lighthouse to the Deadman Point," R. Q. Coxich. 



Polypidom fixed by a small disk, stalked, the stalk cylindrical, 

 striate, expanding into a peziza-like head on which the tubular cells 

 open : these are coalescent and aggregated round the circumference, 

 but the more central ones are either scattered or arranged in imper- 

 fect rows, and near the centre they often stand separate ; their 

 upper half of the tube is usually free, and the walls are minutely 

 granulous ; the aperture circular and plain. There is in some spe- 

 cimens a very narrow rim around the head enclosing the tubes. 

 Ileio'ht three lines ; breadth of the celluliferous disk sometimes 

 about the same, but generally not more than the half. 



" It is calcareous, and about a quarter of an inch in height. The 



