NO. 1526. CORALS FROM FRENCH SOMALILAND—VAUGHAN. 259 



their edg-es. These hirgest costa' correspond to the primaries and 

 secondaries; those corresponding to the higher cycles are thin and not 

 so tall. 



There are between four and five cycles of septa; in the smaller spec- 

 imens the primaries are much thickened and there are some thickened 

 secondaries. In the larger, the first two cycles are nearly equal. The 

 septal margins become more exsert with increasing- size; in the large 

 specimen the primaries and secondaries project as much as mm. 

 above the edge of the wall; the higher cycles, less exsert. The strong- 

 costal spines continue upward on the first two cycles to the summit of 

 the arch. The inner portion of the margins of these septa are with- 

 out coarse dentations, but possess ver}' small dentations, visible only 

 with a lens. Near the columella there are one or two broad lobes, 

 the margins within these lobes falling almost perpendicularly to the 

 edge of the columella. The inner margins of the members of the 

 higher cycles are dentate, even lacerate. The first three cycles extend 

 to the columella; there is considerable grouping of the higher C3'cles 

 around the tertiaries. Both the septal and costal faces are minutely 

 granulate and decidedly rough. 



The columella is well developed, elliptical in outline, liat above, and 

 composed of a mass of anastomosing, line trabecuhe. It extends high 

 up in the calice, in places the edge of the wall actually being- lower 

 than its upper surface. 



Endothecal dissepiments present. 



Genus GALAXEA Oken. 

 GALAXEA, species. 



A single specimen of Galaxea^ attached to the same object, a piece of 

 dead coral overgrown with Serpulia, etc., as two specimens of Favia 

 siwlgni Milne Edward* and Haime, was collected. The corallum is 

 parti}' dead and appears to be abnormal. It probably is a stunted and 

 deformed specimen of (Tal((.r('<i fascicularis (Linnseus). 



The corallites are unequal in size, elliptical in cross-section. The 

 maxinuHii diameter of a calice, measured between thecal sunuuits, 

 .5.25 mm. ; distance between calices from 2 to 4 mm. ; height of coral- 

 lites, measured to top of theca, 4.5 to 6.5 mm.; septal margins exsert, 

 as much as 4 mm. Costaj only slighth^ developed. In the largest 

 calices there are three complete C3'cles of septa, with an occasional 

 quaternary. 



Without a considerable suite of specimens for comparison, I doubt 

 if this specimen can be identified. 



