234 APPENDIX. 



2. CLIONA GOEGONOIDES, Hancock. 



Cliona gorgonoides, Hancock. L. c., vol. iii, p. 332, vol. xix, p. 9. 



Spicula spinulate, - 9 \th of an inch long ; head oval, 

 frequently at some little distance from extremity. 



" A critical species, and is probably a mere variety 

 of C. ceUta " (Hancock). 



Abundant, riddling species of limestone on the 

 Northumberland Coast. 



3. CLIONi NOETHUMBRICA, Hancock. 



Clbna Northumbrica, Hancock. L. c., vol. iii, p. 336; vol. xix, 



). 9, pi. vii, fig. 1. 



Pime Northumbrica, Gray. Proc. Zool. Soc., 1867, p. 525. 

 Clona Northumbrica, Carter. Ann. Nat. Hist., ser. 4, vol. v 



(1870), p. 75. 



Sponge pale ochreous yellow (when dry). Spicula 

 of three kinds, the first much the largest, measuring 

 -/T-thof an inch long, spinulate, straight, sharp-pointed ; 

 head large, round and terminal : the second acerate, 

 scarcely more than one-fourth the length of the first, 

 rather stout, much and suddenly bent in the middle, 

 both ends sharply pointed, and when viewed through 

 a ore- sixth inch object glass, is seen to be minutely 

 spin>us : the third form is very minute, T'sVoth 

 of m inch long, cylindrical, bent sharply in the 

 cenlre, and apparently smooth under the one-sixth 

 obpct glass, though occasionally there are slight 

 indcations of spines; the extremities are recurved, 

 slightly enlarged and rounded. 



n he second and third forms of spicules are more 

 nunerous than the first, which is most abundant in 

 th) papilla3. 



