Eschara. 
Z. ASCIDIOIDA. 
297 
is very distinct from the R. cellulosa, with which it has been con- 
founded.” Fleming. 
2. R. cellulosa, polypidom reticulated , umbilicate , funnel- 
shaped, wavy , celluliferous on the inner side ; the pedicle short , 
subtubular. Ellis. 
Vignette No. 46, page 283. 
Retepora eschara marina, Fer. Imperat . Hist. Nat. 630, c. fig. Ellis , Corail. 
72, pi. 25, fig. d, E>, F. Millepora retepora, Pall. Elench. 243. 
M. cellulosa, Lin. Syst. 1284. Turt. Gmel. iv. 637. Turt. Brit. Faun. 
205. Jameson in Wern, Mem. i. 560. Stew. Elem. ii. 427. Bose , 
Vers, ii. 343, pi. 25, fig. 5. Cavol. Polyp, mar. 73, tav. 3, fig. 12-14. 
Blumenb. Man. 270 M. foraminosa, Ellis and Soland. Zooph. 138. 
pi. 26, fig. 2 Retepora cellulosa, Lam. Anim. s. Vert. ii. 182 . 2de 
edit. ii. 276. Stark, Elem. ii. 435. Fisso, L’Europ. Merid. v. 343. 
Johnston in Mag. Nat. Hist. vii. 638, fig. 69 La Retepore dentelle 
de mer, Blainv. Actinolog. 433, pi. 76, fig- 1 . 
Hab. Deep water, rare. Shetland islands, and in the island of 
Fulah, Jameson. Scarborough, Mr Bean. 
Polypidom about an inch in height, affixed by a hollow, thick, and 
very short stalk, which expands into a shallow cup with unequal wav- 
ed and sinuous margins ; pure white, calcareous and beautifully reti- 
culated, the meshes about a line in length, oval, subequal, regular 
and divided by celluliferous spaces, rather wider than their own short- 
est diameter ; the cells immersed, quincuncial, leaning, with the 
apertures looking upwards, a little prominent, round, with a small 
tooth on the distal edge ; they open only on the superior or inner 
aspect, for the under surface of the polypidom is imperforate and al- 
most smooth. 
39. Eschara,* Ray. 
Character. — Polypidom membrano-calcareous , inflexible , 
brittle , expanding in the form of foliaceous porous lamellae , vari- 
ously folded and anastomosing , and consisting of two layers of op- 
posite c lls : cells immersed , coalescent , horizontal to the plane of 
axis , opening on both surfaces in quincuncial pores protected with 
an operculum . — Polypes ascidian. 
1. E. foliacea, plates foliaceous , winding , uniting irregu- 
larly and forming sinuous cavities. Dillenius. 
Plate xl. 
the scar from a burn. 
