POLYPS AND CORALS. 23 



it a vermicillated appearance, while it is covered with more 

 scattered and pointed granulations, and the exterior of the 

 corallites presents distinct sulcations, or rather linear series 

 of granulations. The cells also are nearly twice as large 

 and the texture of the coral much firmer than in the pres- 

 ent species. 



MADREPOBA PUMILA Yerrill, nov. sp. 



Corallum low and spreading horizontally near the bot- 

 tom, the branches spreading from one side of the coral. 

 These are openly reticulated and occasionally coalescent, 

 crooked, and irregular, flattened from above, giving off from 

 the sides and upper surface short, irregular, scattered 

 branchlets, many of them consisting only of a terminal cell, 

 with one or two small lateral ones ; others are slender and 

 angular, an inch or more long, with a few distantly scattered 

 and rather large lateral cells. Terminal corallites, some- 

 what exsert, thick, sub-conical, being thickened below. Cells 

 with six septa and a thick margin. Lateral corallites few, 

 tuberculiform, thickened at base with a simple tubular lip ; 

 cells but little smaller than the terminal ones, with six sep- 

 ta distinct. On the lower side of the coral there are neither 

 cells nor branchlets, Ccenenchyma very porous and open, 

 spongiform, scabrous, without distinct striations even on the 

 corallites. 



Breadth of coral 5 inches ; height 1.5 j diameter of 

 larger branches .28; of cells .05. 



Bonin Islands. Dr. Wm. Stimpson. 



MADREPORA GLOBICEPS ( ?) Dana. 



A fragment from Groper Shoal, Coral Sea, south-east 

 of Australia. 



MADREPORA TUBICINARIA (?) Dana. 



A Madrepora much broken, agreeing in many respects 

 with this species, consists of a cluster of long and much 

 subdivided branches arising from a thick massive base, form- 



