Cellulauia. ZOOPHYTA. CELLARIADiE. 539 



cellariadj:. 



Gen. LVII. CELLULARIA. — Cells in two rows, alternate, 

 ovate, the openings with sessile margins ; sides of the 

 branches denticulated. 



149. C. Jhstigiata. — Cells semicyhndrical, slightly rounded 

 at the top, with a blunt process at the summit on the outer side 

 of each. 



Corallina cellifera erecta, ramosissima ; tenerrima, et plumosa, Ellis, 

 Coral. 33. t. xviii. f. 1 — Sertularia fast. Linn. Syst. 1314. C. plu- 

 mosa, Pall. El. 66 — Crisia plumosa, Lamour. Cor. Flex. 143 Not un- 



common, beyond low water-mark. 

 Height several inches, dichotomously branched, upright, tufted, irregu- 

 larly jointed ; at the lower part invested with tubular radicles from the up- 

 per branches ; the cells are rather narrow, with pearly ovaria on their upper 

 part. 



150. C. nerit'ma. — Cells quadrangular, lengthened, with a 

 truncated summit, the outer angle projecting. 



Snail-bearing coralline, Ellis., CoraL 35. t. xix Sertularia neritina, Linn. 



Syst. i. 1315 — Cellularia neritina. Pall. El. 67 Acamarchis nerit. 



Lamowr. Cor. Flex. 135..^0n the English coast. 



Height several inches, dichotomously divided, spreading, the cells are nar- 

 row, rather diverging, and more than the half of the outer summit is free ; 

 the pearly, helmet-shaped ovaria, opening transversely, were at one time con- 

 sidered by Ellis as the young of Neritse. I possess a specimen from the col- 

 lection of the late Dr Walker, which he received from Miss Blackburne from 

 the coast of Cheshire. 



151. C. Hookeri. — Cells rounded, diverging, projecting. 



Found by Dr Hooker at Torquay, 1812. 



Height upwards of an inch, dichotomously branched, branches straight, 

 stitF, brittle, divaricate ; the cells are protuberant dorsally, and their rounded 

 top is nearly free, projecting laterally, giving the edge a remarkably jagged 

 outline, and the pearly ovaria are rounded — I observed this species, in a col- 

 lection of zoophytes obligingly presented to me by the celebrated individual 

 to whom, as a mark of my respect and gratitude, I have inscribed it. 



152. C. scruposa. — Cells oval, with a projecting, lateral, trun- 

 cated, pointed wing. 



Creeping stony Coralline, Ellis, Cor. 37- t. xx. f. 4. — Sertularia scrup. 

 Linn. Syst. 1315. — C. scrup. Pall. El. 72 — Crisia scruiJ. Lamour. Cor. 

 Flex. 139 — Adhering to corallines, common. 



Height about an inch, creej)ing, and frequently sending out tubular ra- 

 dicles, dichotomously divided, branches rather broad ; lateral process some- 

 tunes deriticulated on the upper margin ; pearly ovaria round, on the top of 

 the cell. 



