BRITISH SPONGES. ll 
e. On Sertularia faleata. Liverpool, J. Rylands, Esq. Pre- 
sented by G. Johnston, M.D. 
f. On Conferva. Craigorad, Ireland, W. Thompson, Esq. 
Presented by G. Johnston, M.D. 
g. Crustaceous var. Presented by G. Johnston, M.D. 
h. Spicula of a, m Canada balsam. Prepared by J. S. 
Bowerbank, Esq. 
18. HALICHONDRIA incrustans. 
Aleyonium incrustans, Esper, Alcyon. t.15; Lam. Anim. s. Vert. 
ni. 397, 2nd edit. u. 603 ; Lamour. Cor. Flex. 340, Corall. 244. 
Halichondria incrustans, Johnst. Brit. Spon. p. 122. t. 12. fig. 3, 
and t. 13. fig. 5, p. 247. 
Spongia fava, Montagu in Wern. Mem. ii. 115; Gray, Brit. Pl. 
i. 360. 
Spongia panicea, Grant in Edin. Phil. Journ. xii. 104, xiv. 118; 
and in Edin. New Phil. Journ. i. 347,11. 128,138. pl. 2. figs. 4, 24, 
27-29, copied in Blainv. Actinol. pl. 94; not Pallas. 
Halichondria panicea, Flem. Brit. Anim. 520; not Johnst. 
Halispongia panicea, Blainv. Actinol. 532. not robust. 
6. Branched. Presented by G. Johnston, M.D. 
ec. “ Spongia fava, Mont.” Presented by G. Johnston, M.D. 
d. “Hal. panicea, Flem.” Presented byG. Johnston, M.D. 
e. “ Hal. panicea, Flem.” Brit. Sp. t. 12. f.3. Presented by 
G. Johnston, M.D. 
Ff, 9, h. Mass with dry mucus. Presented by G. Johnston, 
M.D. 
i. Mass, washed. Presented by G. Johnston, M.D. 
j. Spicula of a, m Canada balsam. Prepared by J. S. 
Bowerbank, Esq. 
19. HALIcHONDRIA saburrata. 
Halichondria saburrata, Johnst. Br. Sp. p.121.t.11. fig. 3, p.197- 
247. 
a. Br. Sp.t.11.f.3. Presented by G. Johnston,.M.D. 
b. Presented by G. Johnston, M.D. 
c. Spicula of a, im Canada balsam. Prepared by J. S. 
Bowerbank, Esq. 
20. HALICHONDRIA egagropila. 
Halispongia egagropila, Scouler MSS. 
Halichondria egagropila, Johnst. Br. Sp. p.119. t.11.f. 1, p. 248. 
a. With animal matter, Br. Sp. t. 11. f.1. Dublm, Dr. 
Scouler. Presented by G. Johnston, M.D. 
b,c. Washed. Ireland? Presented by G. Johnston, M.D. 
d. Spicula of a, m Canada balsam. Prepared by J. %. 
Bowerbank, Esq. 
