PLATE XV . 1 
AMPHIBLESTRUM. — SlPHONICYTARA. — MEMBRANIPORA. — FOYEOLARIA. — MlCROPORA. 
PAGE 
Figure 1 . — Amphiblestrum cristatum* ...... 65 
1 a, lb, lc, cells with oceeia showing the various avicularia ; 
Id, sterile zooecium. 
,, 2. — Siphonicytara serrulata, . . -. . . .101 
2a, magnified ; 2b, back view, with radical tubes. 
,, 3. — Amphiblestrum imbricatum* . . . .65 
3a, magnified ; 3 b, avicularium. 
,, 4. — Membranipora albida, . . . . . .63 
4a, magnified. 
,, 5. — Membranipora crassimarginata, var. incrustans * . . .63 
5a, magnified. 
,, 6. — Foveolaria falcifera, . . . . . .69 
6a, 6b, magnified. 
,, 7 . — Micropora uncifera, . . . . . .71 
7 a, magnified. 
„ 8. — Amphiblestrum umbonatum* . . . . .66 
8a, 8b, magnified. 
1 The species thus marked (*) have been re-named since the plate was printed off. 
