126 

 CELLULARIA. 



Generic Character: Polypitlom calcareous or niembrano- 

 calcareous, coiifervoid, divided sub-dichotomously, the 

 divisions narrow, composed of two alternatiu;^ series of 

 oblonfj sessile cells on a single plane ; the apertures ter- 

 minal, oblique, facing one vvay and usually covered witli 

 an operculum. Polypes ascidian. 

 CILIATED CORALLINE. C. Ciliata. White, erect, 

 dichotomously branched; cells distinctly alternate, alt 

 opening on one side ; apertures oblique, with four or five 

 long bristles on the upper and outer margins. PI, xxiii., 

 fig. 1. 



Ciliated Coralline, Ellis' Coral., p. 38, pi. 20, fig. d D. 

 Serlularia ciliata, Turton's Lin., vol. 4, p. 685. Stewart's 

 Elem., vol. 2, p. 448. Cellularia ciliata, Flem. Brit. An., 

 p. 540. Ccllaria ciliata, Ellis and Solander's Zooph,, 

 p. 24, no. 6, Crisia ciliata, Lamouroux's Cor. Flex., p. 189. 

 Tenipleton in Mag. Nat. Hist., vol. 9, p. 468. Cellularia 

 eiliata, Johnston's Brit. Zooph., p. 290, pi. 38, fig. I and 2. 



Ilab. Ou Corallines and sponges, near the Eddystone 

 lighthouse; not common. Mount's bay. 



This minate and delicate species grows in down-like tufts 

 to the height of half-an-inch. It is white, calcareous, and 

 dichotomously branched. The cells are distinctly alternate, 

 narrow at the base, and enlarged above; the apert\ires are all 

 turned on one side, and are very large, oblique, with four or 

 five hollow spines, which, when perfect, are about four times 

 as long as the diameter of the cell; these are situated at the 

 upper and outer labial rim. Over the apertures are helmet- 

 shaped pearly lids, which are raised in drying. 

 CREEPING STONY CORALLINE. C. Scruposa. Creep- 

 insTj dichotomously branched ; cells in a double series, 

 alternate; apertures round, unarmed, with a stout angle 

 at the superior and external margin. PI. xxiii., fig. 2. 

 Creeping Stony Coralline, Ellis' Coral., p. 38, no. 4, pi. 20, 

 fio-. c C. Sertularia scruposa, Turton's Liu., vol. 4. p. 685* 

 •Stewart's Elem., vol. 2, p. 448. C. S<'ruposa, Fleming's 

 Brit. An., p. 539. Cellaria scruposa, Ellis and Solander's 

 Zooph., p. 23, DO. 5. Crisia scruposa, Lamouroux's Cur. 

 Flex., p. 139. Templeton in Mag. Nat. Hist,, vol. 9, p. 469. 

 Cellularia scruposa, Johnston's Brit. Zooph., p. 291, pi. 38, 

 fig. 5 and 6. Bellamy's South Devon, p. 270, 



Uub. On the roots of sea weed, on Corallines, and on 

 the back of the Corwich crab. \yijilsand bay. Looe. 

 Polperro. Lanlivet bay. Fowey. Goran. Port Loe. 

 Mount's bay. 



