Crisia. 
Z. ASCIDIOIDA. 
261 
s. Vert. ii. 139. 2de edit. ii. 187 — Eucratea cornuta, Lamour. Cor. 
Flex. 149. Corail. 64. Risso, L’Europ. Merid. v. 319. Flem. Brit. 
Anim. 541. Templeton, in Mag. Nat. Hist. ix. 469 — - — L’Unicellaire 
cornue, Blainv. Actinol. 462. 
Hab. Parasitical on other corallines, and “ adhering to Fuci be- 
yond low water-mark, not common,” Fleming . Very rare at Scar- 
borough, Mr Bean. Occasionally found in tufts of Crisia eburnea 
on the coast of Berwickshire, G. J. “ Found in the pools on the 
rocks below Bangor, very common,” Templeton. 
Polypidom sometimes half an inch in height, very slender, erect, 
confervoid, white and brittle when dry, rooted by a few tubular fibres, 
alternately branched, the secondary branches unilateral, secund. 
The coralline consists of a series of cells placed one above another, 
the upper cell originating from the one below near the middle, at its 
point of divarication from the straight line ; and a long tubular spine, 
which overtops the cell, rises from the same place. The cells are 
curved, tubular, smooth, the upper half everted, with a plain circular 
aperture. In some specimens oval-shaped vesicles are found scatter- 
ed over the polypidom : they originate from the base of a cell, are 
specked, and have a small tube at the back. 
2. C. chelata, cells in the form of a horn ; the aperture ob- 
lique, marginated , unth a spinous process beneath the rim. Ellis. 
Vignette, Fig. 43, page 260. 
Bull’s-horn Coralline, Ellis, Corall. 42, no. 9, pi. 22, fig. b,B Sertu- 
laria loricata, Lin. Syst. 1316. Berk. Syn. i. 220. Turt. Gmel. iv. 
686. Turt. Brit. Faun. 217. Stew . Elem. ii. 449.— — Cellularia che- 
lata, Pall. Elench. 77 Cellaria chelata, Ellis and Soland. Zooph. 25. 
Bose, Vers, iii. 134. Lam. Anim. s. Vert. ii. 140. 2de edit. ii. 189. 
— —Eucratea chelata, Corail. 64, pi. 3, fig. 5 E. loricata, Flem. 
Brit. Anim. 541. L’Unicellaire cornet, Blainv. Actinolog. 461, pi. 
77, fig. 2 — — Loricula loricata, Templeton, in Mag. Nat. Hist. ix. 469. 
Hab. Parasitical on Fuci, rare. On stones at very low tides, very 
rare at Scarborough, Mr Bean. “ Common on the coast” of Ire- 
land, Templeton. Cork Harbour, J. V. Thompson. 
Smaller and more distinctly catenulated than the preceding. Ellis’s 
description is very good. “ This beautiful coralline is one of the 
smallest we meet with. It rises from tubuli, growing upon Fucus’s ; 
and passes from thence into sickle-shaped branches, consisting of 
single rows of cells, looking, when magnified, like bull’s horns invert- 
ed, each one arising out of the top of the other. The upper branches 
take their rise from the fore part of the entrance of a cell, where we 
may observe a stiff short hair, which seems to be the beginning of a 
