238 APPENDIX. 



Sponge in a dried state, of a brownish-yellow colour. 

 In shells of Pectunculus pilosus, Isle of Man (Mr. 

 Alder). 



9. CLIONA LOB ATA, Hancock. 



Cliona lobata, Hancock. L. c., vol. iii, p. 341, pi. xii, figs. 4 and 



8 ; vol. xix, p. 11, pi. vii, fig. 6. 

 Pronax lobata, Gray. Proc. Zool. Soc., 1867, p. 526. 



Spicula of two kinds, the first spinulate, YoU^n of 

 an inch long, not very slender, mostly a little bent, 

 and brought gradually to a sharp point at one end, 

 the other with an irregularly rounded head, sometimes 

 slightly elliptical, and generally not exactly terminal : 

 the second cylindrical, y^o-th of an inch long, rather 

 stout, arched and zigzagged, being six or seven times 

 angulated ; it is strongly spined, particularly at the 

 angles ; the extremities are obtuse. 



The dried sponge is of a dark snuff colour. 



In shells of Haliotis tuberculata from Guernsey, and 

 in an oyster from the West of Scotland. 



c. VAKIOUS BRITISH SPONGES. 



1. HALISAECA DUJABDINII, Johnston. 



Halisarca, Dnjardin. Ann. des Sci. Nat., n.s., vol. x, p. 7, pi. i, 



fig. 5. 

 Halisarca Dujardinii, Johnston. Brit. Spong., 1842, p. 192, pi. 



xvi, fig. 8. 

 Halisarca Dujardinii, Carter. Ann. Nat. Hist., ser. 4, vol. xii 



(1873), p. 25 ; and vol. xiii (1874), p. 315. 



