NO. 1 DURHAM, BARNARD: EASTERN PACIFIC STONY CORALS 31 



Family Agariciidae 



Genus AGARICIA Lamarck 



Agaricia Lamarck (1801), Syst. Anim. sans Vert., p. 373. 

 Genotype : Madrepore undata Ellis and Solander. 



Agaricia sp. 

 Plate 2, fig. 9 



A small, slightly worn fragment is referred to this genus. Calices 

 deep, arranged in linear rows, with high ambulacra separating the rows; 

 septa equal in size, continuous on the ambulacra, about 20-24 per calice ; 

 septal faces with rather large granules ; bottoms of calices incrusted with 

 sand, columellar structures not clear. 



Hypotype: Cat. no. 9.1 (Bottom sample 341). 



Material examined: The hypotype. 



Distribution: 10 mi. southwest of south of Secas Islands, 30 fms. 



Genus LEPTOSERIS Milne Edwards and Haime 



Leptoseris Milne Edwards and Haime (1849), Comptes Rendus Acad. 

 Sci. Paris, vol. 29, p. 72. 

 Genotype : Leptoseris fragilis Milne Edwards and Haime. 



Leptoseris digitata Vaughan ( ?) 

 Plate 2, figs. 10a, b 



Leptoseris digitata Vaughan (1907), U.S. Nat. Mus., Bull. 59, pp. 

 140-141,pl. 42, figs. 1,2. 



The specimens referred to this species do not show any calices, are 

 very thin orally to adorally, and have curled margins ; costae subequal, 

 rounded, with narrow interspaces ; septocostae of the lower parts of the 

 corallum continue adorally, while the costae from the higher parts of 

 the corallum fuse or die out; septa subequal, interspaces 2-3 times as 

 wide as thickness of larger septa, faces minutely granulated, occasionally 

 with a slight amount of granular fusion to form ledges. The specimens 

 are much smaller than those figured by Vaughan. Van der Horst ( 1921 ) 

 has suggested that the present species and L. papyracea Dana are the 

 same. The present material is inadequate to state definitely that it is 

 specifically identical with Vaughan's species. 



Two other specimens from Bottom samples 329 and 330 have calices 

 similar to L. digitata but have low, broad, adoral costae which are some- 



