9 ^ 
TRIBE III.— "MADEEPORACEA. 
Appendix. — Madrepora laxa {Lamarcli ). — Loose ramose, branches terete, 
spreading', proliferous at apex. Corallum having the calicles tubiform, un- 
equal, with the exterior echinulate. 
Genus II. — MANOPOEA.' — Dana. 
Foliaceous, glomerate, or subramose, never arborescent, and | j 
branches not terete, having short tentacles, often alternately:; 
large and small, and no apical parent-polyp distinguishable. 
Corallarn with the calicles irregular, often spinuloso-laciniate, 
often wholly obsolete. 
The described species of division TV constitute the genus I 
Montrpora of Blainville; and the rest (including Ehrenberg’s 
species) are part of the old genus Porites. li 
Arrangement of the Species. 1 
I. Short tubiform calicles, more or less angular, surface not papillose. 
1. M. gemmulata. 3. M. caliculata. 
2. M. lichen. 
II. No distinct calicles; surface of the coralla papilloso-asperate. 
a. Free foliaceous or subramose. 
4. M. palmata. 
5. M. compressa. 
6. M. crista-galli. 
7. M. spumosa. 
8. M. circumvallata,. 
i 
9. M. hispida. j 
10. M. foliosa. ^ 
Jl. M. expansa. I'' 
12, M. grandifolia. i; 
b. Glomerate, incrusting, but not subramose [except becoming so by Incrusiing 
other bodies). 
13. M. efiusa. 16. M. nodosa. 
14. M. stilosa. 17. M. scabricula. i 
15. M. venosa. ' ^ 
III. Cells immersed; surface of the coralla very uneven; but not regiilarly| 
papillose. 
18. M. incrassata. 19. M. erosa. 
IV. Cells immersed; surface of the coralla not spinuloso-asperate ; inter-i 
stitial spaces prominent, or with rounded verrucse or long ruga?. ' 
20. M. capitata. 24. M. verrucosa. 
21. M. nudiceps. 25. M. tuberculosa. 
22. M. lima. 26. M. planiuscula. 
23. M. papillosa. 
