42 CLADOCORA PATEIARCA. 



Antillia explanata v. sp. 



PI. VII. fifjs. I 5, 6. 



Corallum horizontally flattened, with almost horizontal base having a small 

 area of attachment in the centre. Epitheca complete, wrinkled, concealing 

 all trace of costaj. Endotheca abundant and vesicular. Calicle oblong, some- 

 what irregular, shallow. Septa in five cycles with a few of the sixth ; sys- 

 tems not readily distinguished, as the primaries, secondaries, and tertiaries 

 are nearly equal. The septa are thin, ornamented with rows of very small, 

 sharp tubercles ; their border is divided in numerous branching spines, 

 which in the younger septa anastomose so as to form a delicate network. 

 Columella well developed, formed of numerous twisted and tangled processes. 

 Greatest diameter 4 cm., lesser 3 cm.; height a little over 1 cm. 



Barbados, 75 fathoms. 



This is the first specimen of this extinct genus found living. Seen from 

 above it is indistinguishable from a Lithophyllia, but its lower surface with 

 its epitheca and small point of attachment immediately reveals the difference. 



CLADOCORACE^ M. Edw. & H. 



CLADOCOEA M.-Edw. & H. 



Cladocora patriarca n. sp. 



PI VIL fig. 7. 



Corallum forming from a parent corallite from whicli numerous younger 

 ones grow at a very open angle, and remain smaller than the primitive one. 

 Costse well marked, but not prominent, rather smooth. Fossa not as deep as 

 usual in this genus. Septa very little serrated, scarcely exsert, in six unequal 

 systems, the fourth cycle being developed in a few half-systems only. Pali 

 much more developed than in most other species of this genus; pointed, 

 fronting the septa of all but the last cycle, unequally distant from the centre. 

 Columella well developed, papillar. 



Height 4 - 4.5 cm.; diameter of calicle 4-5 mm. Depth of fossa 1 mm. or 

 less. 



Off Cape Frio, Brazil, in 35 fathoms. 



