290 
ASCIDIOIDA. 
Cellularia. 
Flustra arenosa , Ellis and Soland. Zoopb. 17. Stew. Elem. ii. 437. 
Bose, Vers, iii. 142.- Millepora arenosa anglica, Raii, Syn. i. 31.- 
English Sandy Millepore, Ellis, Corail. 74, no. 5, pi. 25, fig. e. 
Eschara lutosa, Pall. Elench. 37. - — Alcyonium arenosum, Turt. Gmel. 
iv. 564- Turt. Brit. Faun. 207 According to Mr Boys this “isun- 
doubtedly the nidus of some marine animal, as I have found the cells en- 
tire, with eggs in each.” Lin. Trans, v. 231. Mr J. Hogg has proved 
that it is the nidus of Nerita monilifera. Lin. Trans, xiv. 318, &c. 
36. Cellularia,* Pallas. 
Character. Polypidom calcareous or membrano-calcareous , 
confer void) divided subdichotomously , the divisions narrow , com- 
posed of two alternating series of oblong sessile cells on a single 
plane ; the apertures terminal , oblique , facing one way , and usual- 
ly covered with an operculum. — Polypes ascidian. 
. 1. C. ciliata, erect , dichotomous ; cells alternate , turbinate , 
with an oblique open aperture armed on the outer edge with 4 or 
5 long spines . — Ellis. 
Plate xxxviii. Fig. 1-2. 
Ciliated Coralline, Ellis, Corail. 38, no. 5, plate 20, d, D. Sertularia 
ciliata, Lin. Syst. 1316. Berk. Syn. i. 220. Turt. Gmel. iv. 685. Turt. 
Brit. Faun. 217. Wern. Mem. i. 565. Stew. Elem. ii. 448.- Cellu- 
laria ciliata, Pall. Elench. 74. Elem. Brit. Anim. 540. Hogg's Stock. 
35. Cellaria ciliata, Ellis and Soland. Zooph. 24. Bose, Vers, iii. 
133. Lam. Anim. s. Vert. ii. 139. 2de edit. ii. 186 Crisia ciliata, 
Corall, 60. Templeton in Mag. Nat. Hist. ix. 468 La Bicellaire ci- 
liee, Blainv. Actinolog. 459. 
Hab. Parasitical on corallines and the roots of Fuci, not uncom- 
mon. “ Mare Anglicum ; ubi, in Fucis, Spongiis, Sertulariis, para- 
sitica crescit,” Pallas. Leith shore, Jameson . Scarborough, Mr 
Bean. Rare on the coast of Berwickshire, G. J. “ Found on Fu- 
cus siliquosus, and on other corallines” in Ireland, Templeton. 
Tufted, about half an inch in height, very slender and delicate, 
hispid, pellucid white, calcareous, dichotomously branched. The 
cells are rather widely alternate, turbinate, with the apertures evert- 
ed, patulous, and armed with long spines which are apt to be broken 
off. The spines appear to be tubular. A sacate pearly lid covers 
the mouth of many cells ; and at or near the base there is, on some 
of them, a small anomalous appendage something like a bird’s head. 
The pellucidity and delicacy of this species, with its pearly lids scat- 
From cellula, diminutive of cella , a cell. 
