APPENDIX. 235 



In shells of oysters and Fusus antiquus or Nor- 

 thumberland coast (Hancock), Devon (Parfitt and 

 Carter). 



4. CLIONA VASTIFICA, Hancock. 



Cliona vastifica, Hancock. L. c., vol. iii, p. 342 ; vol. xix, p. 9, 

 pi. vii, fig. 2. 



Spicula of three kinds, the first spinulate, sVth of 

 an inch long, straight, rather slender, and diminishing 

 imperceptibly to a very fine point at one end, the other 

 terminating in a perfectly globular head : the second 

 acerate, one-third the length of the first, and much 

 more slender, stoutish in the centre, where it rather 

 suddenly bends a little and thence tapers gradually 

 towards the ends, which are sharply pointed ; every- 

 where minutely spined, but in some instances the 

 spines are sufficiently strong to be observed with a 

 one-fourth inch object glass : the third form is -2~iVo^ Q 

 of an inch long, cylindrical, irregularly bent or 

 angulated once or twice, occasionally three times ; it 

 has a central angle and is strongly spined, the 

 extremities are obtuse. 



In oyster shells. 



5. CLIONA CORALLINOIDES, Hancock. 



Cliona corallinoides, Hancock. L. c., vol. iii, p. 337, pi. xv, figs. 



1 and 2 ; vol. xix, p. 10, pi. vii, fig. 3. 

 Cliona corallinoides, Carter. Ann, Nat. Hist., ser. 4, vol viii 



(1871), p. 14 (separate copy), pi. ii, figs. 34 37. 



Spicula of three kinds, the first spinulate, y^th of 



