A. E. Yerrill — JBermudian and West Indian Reef Corah. 101 



The costse are thick, not very high, meeting or inosculating 

 between the calicles, and covered with a single row of small, slender, 

 rough spinules. The columella is well developed, formed of con- 

 torted trabecular processes, and often having a small pit in the cen- 

 ter and a few erect spinules, similar to the slender, rough, paliform 

 teeth that often (but not regularly) stand at the base of some of the 

 12 larger septa. 



In sections the walls are very thick and nearly solid. The endo- 

 thecal dissepiments are small, thin, irregularly convex or flat above. 

 The calicles are not filled up below, or only slightly encroached upon, 

 by a deposit between some of the septa. Diameter of the calicles 3 

 to 3.5 mm ; distance between them mostly 2 to 4 mi ", often more. 



Florida Reefs (Maj. E. B. Hunt), Yale Museum, No. 98. Near 

 Nassau, N. P. (coll. R P. Whitfield), Amer. Mus., New York. 



This has the general appearance of 0. annidaris, but with calicles 

 larger than usual and decidedly farther apart. The walls and 

 exotheca are much thicker and more solid, and the endothecal cells 

 are fewer and less regular. The sharply spinulose and hispid septa 

 and costce are also characteristic. The exothecal deposits are nearly 

 as solid as in Oeulina. 



A Nassau specimen, in the American Museum, is an irregular 

 rounded mass, about five inches in diameter and three to four thick, 

 with a lobulated surface. The coral is heavy and solid ; the surface 

 of the coenenchyma is spinulose ; the costse well developed. The 

 calicles are more variable in size than in the type, in some places 

 being one-half smaller and closely crowded. Coll. R. P. Whitfield. 



Orbicella Braziliana Ver., nom. nov. 



Orbicella cavernosa Quelch, Voy. Chall., xvi, p. 106, 1886 (non Lam.). 



I propose this name for the form taken by the Challenger, off 

 Barra Grande, Brazil, in 30 fathoms. 



According to Quelch it forms rounded masses two feet in diame- 

 ter. Its exotheca is so vesicular as to partly hide the costae ; the 

 septa are uniformly thickened. As he refers it to cavernosa, it 

 should have large calicles with four cycles of septa. Since nearly 

 all the other Brazilian corals are distinct from the West Indian, the 

 locality and depth where this was found, as well as the characters 

 mentioned, indicate a species distinct from the common West Indian 

 reef species. 



