274, ANATOMY AND PHYSIOLOGY 

 FIG. 



274. SMOOTH SOLID SILICEOUS FIBRE. From McAn- 

 dreivsia, Gray. X 175 linear. Pages 13, 79, 

 and 204. 



275. TUBERCULATED SOLID SILICEOUS FIBRE. From Dactylo- 



calyx pumice a, Stutchbury. X 108 linear. Pages 

 79 and 204. 



276. TUBERCULATED SOLID SILICEOUS FIBRE, very promi- 



nently tuberculated. From Dactylocalyx Prattii, 

 Bowerbank, MS. X 175 linear. Pages 80 and 

 204. 



277. SIMPLE FISTULOSE SILICEOUS FIBRE, SPINULATED. 



From Farrea occa, Bowerbank, MS. X 108 

 linear. Pages 13, 80, and 204. 



PREHENSILE FIBRE. 

 278. ClDARATE PREHENSILE FISTULOSE SILICEOUS FIBRE. 



From a parasitical siliceo-fibrous sponge from the 

 south sea ; showing the position of the prehensile 

 organs at the base of the sponge. X 83 linear. 



Page 80. 



FIBRILATED FIBRE. 



279. FIBRILATED SPONGE FIBRE. From the skeleton of one 



of the sponges of commerce. X 308 linear. 

 Page 73. 



280. FIBRILATED SPONGE FIBRE. From one of the rigid 



Australian sponges. X 175 linear. Page 73. 



CELLULAR TISSUES. 







281. A group of cells on a piece of an interstitial membrane 



from Ecionemia acervus, Bowerbank, MS. X 660 

 linear. Pages 81 and 88. 



2 Q 2. Cells on a portion of the interstitial membrane of 

 Halichondria nigricans, Bowerbank. X 308 linear. 

 Pages 82 and 88. 



