290 ASCIDIOIDA. Cellularia. 



Flustra arenosa, Ellis and Soland. Zooph. 17. Steiv. Elem. ii. 437- 



Bosc, Vers, iii. 142. Millepora arenosa aiiglica, Raii, Syn. i. 31 



English Sandy Millepore, Ellis, Corall. 74, no. 5, pi. 25, fig. e 



Escharalutosa, Pall. Elench. 37. Alcyonium arenosum, Turt. Gmel. 



iv. 364. 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 memhrano-calcareousy 

 confervoid, divided sidtdichotomously, the divisions Jiarrow, com- 

 posed of two alternating series of ohlong sessile cells on a single 

 plane ; the apertures terminal, oblique, facing one way, and usual- 

 ly covered with an opercidum. — 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, Corall. 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. Flem. Brit. Anim. 340. Hogg's Stock. 



35. Cellaria ciliata, Ellis and Soland. Zooph. 24. Bosc, Vers, iii. 



133. Lam. Anim. s. Vert. ii. 139. 2de edit. ii. 186 Crisia ciliata, 



Corall. 60. Tempkton in Mag. Nat. Hist. ix. 468 La Bicellaire ci- 



liee, Blainv. Actinolog. 439. 



Hah. 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. Scarboroug-h, 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 j)early 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, diniir.utive of cella, a cell- 



