EXPLANATION OK PLATE XI-V. 



Aiiipliii)oiK HUKtralasica, Efh.jil. 



Fig. 1. Loiifritnflitial section of portion of a hand specimen 



disnlaviiiir several brandies, in all of whicli tlie con- 



.... 

 tin tiously reticulate tissue is visible, and at the upper 



end of tlie second branch (inwards) on the left of the 



fif/ure may be seen a small length of the axial canal 



— X 4 diain. 



Amphipora ramosa, I'hiU'rps, sp. 



Fig. 2. Transvei-se section of a branch showing " tlie axial 

 tube and large marginal vesicles, with intermediate 

 reticulated tissue" ('ifter Nichnlsnn) — x 12 diam. 



Fig. 3. Longitudinal section of a branch in whicli "marginal 

 vesicles are not develojied, and the axial canal is 

 intersected by well developed tabulae" {after Nichol- 

 son) — X 8 diam. 



