234 BULLETIN: MUSEUM OF COMPARATIVE ZOÖLOGY. 
By comparing the description given above of hilli, with Reuss's excellent 
description of acutimargo,! the close relationship of the two species will be 
very apparent, 
CLADOCORA, EnrenBrro. 
Cladocora jamaicaensis, sp. uov. 
Plate XXXVI. Figs. 5-7. 
| One specimen has been submitted to me. It consists of many branches 
| Y of Cladocora firmly embedded in an indurated matrix of dark colored calcare- 
| ous sand and clay, or argillaceous limestone. In places the matrix is stained 
yellow by oxide-of iron. 
The greatest length of the branches could not be made out, but one piece 
Ba measured at least 65 mm., and another 50 mm. The following will show the 
| size, in millimeters, of the corallites in cross section. The numbers marked 
Bl by asterisks are young. 
| 
1 2 3 4 5* 6* 
| A a RSEN nn, 
Greater diameter . . 7.5 6.5 8 7 5 4 
Lesser T 34 6. 5. 6.5 5 4 3.5 
The distance apart of the branches in the colony is variable, but they 
are not much crowded, the usual distance being from 3.5 to 7 mm. To be 
sure, in some instances the branches may be closer together or farther apart. 
No epitheca was observed. The outside of the corallites is marked by low 
acute coste, corresponding to all septa. In size they may vary according 
a to the cycles of septa to which they respectively belong, or may be subequal. 
m The septa are in four complete cycles, and there may occasionally be some 
| members of the fifth. The larger septa show thickenings on their inner ends, 
probably pali. There are not many dissepiments, those present are thin and 
belly inward toward the centre of the corallite. The columella is variable in 
its development: in one young calice there is no columella, the axial space 
being vacant ; in other corallites there are a few processes from the septal 
ends forming a very insignificant false columella, while in others the septal 
processes have formed a distinct well developed false columella. Reproduc- 
tion by lateral gemmation, two buds may stand opposite each other, as in Fig- 
ure 6, Plate XXXVI. 
Locality. Solomon Mountain, west of Mint, Westmoreland Parish (R. T. 
Hill, collector). 
Type. Collection of Museum of Comparative Zoólogy. 
1 Op, ct, Vol. XXXII. pp. 26, 27. 
