HALICHONDRIA. 115 



Alcyonium paniceum, Lam. Aniin. s. Vert. ii. 400 . •2de edit. ii. G07. 

 Alcyonium tubulosum, Esper, Alcyon. 40, tab. 11, fig. 1, 2. 

 Var. /. The surface papillose, the papillae large, conical, and tubular, with 



a terminal osculum ; texture often less compact, so that the pores 



are readily visible to the naked eye. ( Fig. 3, 4, Plate xi. Fig. 5. ) 

 Cock's-comb Sponge, Ellis in Phil. Trans, abridg. xii, 261. pi. 7, 



fig. F. 

 Alcyonium manus diaboli, Lin. Syst. 1296. Esper, Alcyon. 66, tab. 



21, fig. 1,2; and tab. 22. 

 Spongia cristata, Ellis and Soland. Zooph. 186. Turt. Gmel. iv- 



659. Turt. Brit. Faun. 208. Bosc, Vers, iii. 172. Stew. Elem. ii. 



434. Montagu in Wern. Mem. ii. 103. Lamour. Cor. Flex. 28. 



Corall. 156. Gray, Brit. PI. i. 359. Templeton in lib. cit. ix. 



471. Risso, I'Europ. Merid. v. 370. 

 Sp. papillaris, Montagu in Wern. Mem. ii. 90. Grant in Edin. New 



Phil. Journ. i. 343 ; and ii. 1.38, pi. 2, fig. 2, 21, 25, 26. Roget, 



Bridgew. Treat, i. 149, fig. 53. 

 Scypha papillaris, Gray, Brit. PI. i. .357. 

 Halina papillaris, Grant in Cyclop. Anat. and Phys. i. 108, fig. 



29; and Outl. Comp. Anat. 311, fig. 108. 

 Spongia compacta, Sowerhy's Brit. Misc. 85, pi. 42. Turt. Br. Faun. 



208. 

 Var. t. Sponge forming a solid roundish wart-like or tuberous mass. 

 Fig. 5. 



Hab. On rocks between tide-marks, on crabs, shells and co- 

 rallines, and on the roots, stalks and fronds of the larger Fuci, 

 very common ; and seemingly met with on all parts of the Bri- 

 tish coasts in profusion. 



Forms an irregular and often very extensive crust from one- 

 eighth to nearly an inch in thickness, in general of an orange- 

 yellow colour, sometimes with a considerable mixture of green, 

 becoming greyish-white when bleached or dried, and covered 

 with a sort of thin compact and reticulated epidermis. The 

 sponge is rather firm, compressible but not elastic, porous and 

 cellular, and perforated with canals which open on the surface, 

 either level with it, or mammillary, or elevated into large papil- 

 lary processes, that are either separate or confluent, and each of 

 which is terminated by a wide fecal orifice. We may often per- 



