346 POLYZOA INFUNDIBULATA. 



Polypes with about 22 tentacula, which are "nearly a third of the 

 length of the body, and there appear to be about 50 cilise on each 

 side of a tentaculum, making 2200 cilise on each polypus. In this 

 species there are more than 18 cells in a square line, or 1800 in a 

 square inch of surface, and the branches of an ordinary specimen 

 present about 10 square inches of surface ; so than a common speci- 

 men of the F. carbasea presents more than 18,000 polypi, 396,000 

 tentacula, and 39,600,000 cilise." Grant. 



5. F. SETACEA, cells in two or three rows, oval, with a 

 setaceous bristle. Rev. Dr. Fleming. 



Flustra Ellisii, Fleming in Wern. Mem. ii. 251, pi. 17, fig. 1-3. F. setacea, Flem. 

 Brit. Anim. 536. 



Hob. "Along with Cellepora cervicornis, from deep water, Zet- 

 land," Dr. Fleming. 



" Height nearly two inches ; branches linear, not the tenth of an 

 inch in diameter ; substance firm, brittle ; the base consists of small 

 tubes, which, by their union, form the branches, clorsally carinated 

 by the union of the tubes, which, diverging to each side and divid- 

 ing, form two denticles and a long bristle, the latter serrated on one 

 side ; cells oblique." Dr. Fleming. 



6. F. AVICULABIS, cells in four or five rows, oblong, with a 

 strong conical spine at each side of the aperture. Ellis. 



PLATE LXIII. FIG. 3, 4. 



Corallina cum appendiculis lateralibus avium capitum forma, Ellis Corall. pi. 58, fig. 7. 

 Cellularia avicularia /3, Pall. Blench. 68. Flustra avicularis Sowerby Brit. Misc. 

 ii. 21, pi. 71. Flem. Brit. Anim. 536. Johnston in Trans. Newc. Soc. ii. 265. 

 Blainv. Actinolog. 451. Couch Zooph. Cornw. 54: Corn. Faun. iii. 122. F. an- 

 gustiloba, Lam. Anim. s. vert. ii. 158. 2de 6dit. ii. 222. F. capitata, Hogg's 

 Stock. 36. Crisia flustroides, Lamour. Corall. Flex. 141. 



Hdb. Attached to other corallines and old shells in deep water. 



Usually about an inch in height, csespitose and fan-like, or spread 

 out circularly, of a cinereous colour, membrano-calcareous, brittle 

 when dry, deeply divided in a dichotomous manner into narrow thin 

 plane segments, truncate at the end, formed of four or five series of 

 oblong cells, capped with a hollow globose pearly capsule seated be- 

 tween the spines, of which there is one on each side of the circular 

 aperture. The ovarian capsules are so numerous that they give to 

 the upper surface the appearance of being thickly strewn with orient 



