358 Verrill, Notes on Madiata. 



Symphyllia Harttii Verriii, sp. nov. (?) 



This coral, although having the walls of the cells united laterally, 

 and presenting all the characters of the genus SympJiyllia, presents in 

 the form and structure of its cells, septa, and costa», such a close 

 agreement with the preceding species that it may ultimately prove to 

 be only a peculiar form of it. On this account, I have thought it best 

 to give it the same specific name. In Mr. Hartt's collection, however, 

 there are no intermediate forms. 



Corallum. forming low hemispherical masses, attached by a broad 

 base, which is covered by a strong epitheca, extending to about "3 

 inch from the margin, beyond which there are numerous strong, sub- 

 equal costae, covei-ed with many strong, sharp spines. Cells subcir- 

 cular, not united in series, "5 to "8 inch in diameter, moderately deep, 

 the walls united to near the summits, bearing on the space between 

 the cells, spinose costae, like those of the exterior margin. Septa 

 agreeing in the form of the teeth, and S])inous lateral processes, with 

 those of the preceding species, but difiering in being considerably 

 thickened next to the wall and at the summit, and, therefore, bearing 

 stouter upper teeth. Columella loose, convoluted, a little more devel- 

 oped than in the last species. 



Abrolhos Reefs, Brazil, — C. F. Hartt. 



Occurs with Mussa Harttii on the always submerged border of the Recife do Lixo, 

 Abrolhos. — c. F. H. 



Porites SOlida Verrill, sp. nov. 



Corallum, remarkably firm and heavy for a Porites, encrusting or 

 massive, forming rounded masses with an uneven surface ; base with 

 a spreading margin, covered with a strong epitheca. Cells unusually 

 large and deep for the genus, well defined, subcircular, separated by 

 a rather thick wall, which is acute and divided into strong, rough, 

 spinous processes. Septa twelve, nearly equal, well developed, rather 

 wide, the inner edge perpendicular and irregularly toothed, sides 

 scarcely roughened ; pali not distinct. Columella well developed, at 

 the bottom of cell solid and uniting the septa, surmounted by a small 

 tubercle. 



Diameter of the cells about '08 of an inch. 



Abrolhos Reefs,— C. F. Hartt. 



This species approaches more nearly to P. Guadaloupensis Dnch. and 

 Mich, than to any other West Indian form ; but differs in its deeper 

 cells, thicker walls, wider septa, and more solid structure. The same 

 characters, together with the large size of the cells and non-crispate 

 septa, will serve to distinguish it from the other West Indian species. 



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