BRITISH SPONGES. 
11 
e. On Sertularia falcata. Liverpool, J. Il)dands, Esq. Pre- 
sented by G. Johnston, M.D. 
/. 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, in Canada balsam. Prepared by J. S. 
Bowerbank, Esq. 
18. Halichondria incrustans. 
Alcyonium incrustans, Esper, Alcyon. 1 . 15; Lmn. Anim. s. Vert, 
ii. 397, 2nd edit. ii. 603 ; Lamour. Cor. Flex. 340, Corail. 244. 
Halichondria incrustans, JoJinst. Brit. Spon. p. 122. t. 12. fig. 3, 
and 1 . 13. fig. 5, p. 247- 
Spongia fava, Montagu in Wern. Mem. ii. 115; Gray, Brit. PI. 
i. 360. 
Spongia panicea. Grant in Edin. Phil. Journ. xiii. 104, xiv. 118 ; 
oxid 'mE din. New Phil. Journ. 347, ii. 128,138. pi. 2. figs. 4, 24, 
27-29, copied in Blainv. Actinol. pi. 94 ; not Pallas. 
Hahchondria panicea, Flem. Brit. Anim. 520 ; not Johnst. 
Halispongia panicea, Blainv. Actinol. 532. not robust. 
b. Branched. Presented by G. Johnston, M.D. 
c. Spongia fava, Mont.’’ Presented by G. Johnston, M.D. 
d. ‘Mlal. panicea, Presented by G. Johnston, M.D. 
e. “ Hal. panicea, Flem.” Brit. Sp. 1. 12. f. 3. Presented by 
G. Johnston, M.D. 
f. g, h. Mass with diy mucus. Presented by G. Johnston, 
M.D. 
i. Mass, washed. Presented by G. Johnston, M.D. 
j. Spicula of a, in Canada balsam. Prepared by J. S. 
Bowerbank, Esq. 
19. Halichondria saburrata. 
Hahchondria saburrata, Johnst. Br. Sp. p. 121. 1. 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, in Canada balsam. Prepared by J. S. 
Bowerbank, Esq. 
20. Halichondria segagropila. 
Halispongia segagropila, Scouler MSS. 
Hahchondria segagropila, Johnst. Br. Sp. p. 119. 1. 11. f. 1, p. 248. 
a. With animal matter, Br. Sp. t. 11. f. 1, Dublin, Dr. 
Scouler. Presented by G. Johnston, M.D. 
b, c. Washed. Ireland? Presented by G. Johnston, M.D. 
d. Spicula of a, in Canada balsam. Prepared by J. S. 
Bowerbank, Esq. 
