NO. 1 DURHAM, BARNARD: EASTERN PACIFIC STONY CORALS 15 



base and as tall as the surrounding spines ; surface of columella only 

 slightly depressed below coenenchyma ; at union of inner ends of septa 

 with columella there may be a rude marginal spinelet, apparently the 

 fusion of several of the septal granules. 



This species may be separated from AI. kauaiensis Vaughan by the 

 lack of well-developed costae. However, it is closely related to this 

 species. 



From the available figures of the cited references it appears that the 

 coenenchymal spines of typical, AI. asperula are not as tall as the exsert 

 septal processes ; thus the specimens herein described may need specific 

 designation. 



Hypotype: Cat. no. 1. 1 (Sta. 201-34). 



Material examined: Stas. 201-34 (1), A 18-39 (1). Cat. nos. 

 1.1-1.2. 



Distribution: Ofif Gardner Bay, Hood Island, 25-35 fms. The 

 Atlantic station number is 8 mi. southwest of San Nicolaas Bay, Aruba, 

 23-24 fms. 



Madracis sp. 



Plate 1, fig. 1 



There are 3 minute fragments from Bottom sample 453, the largest 

 one with 7 calices preserved on it, and having the aspect of M. duncani 

 Wells (1945) as exemplified by his PI. 1, figs. 11, 12. The individual 

 corallites are close to one another and have common walls; 10 major 

 septa reach the columella and faint suggestions are present in the inter- 

 spaces of secondary septa appearing as striae on the walls ; the columella 

 appears to have been styliform ; the septal faces are granulated. Two 

 extremely worn specimens from Bottom sample 541 may represent the 

 same genus and species. 



Hypotype: Cat. no. 2.1 (Bottom sample 453). 



Material examined: Bottom samples 453 (3), 541 (2). Cat. nos. 

 2.1-2.2. 



Distribution: Gardner Island, 35 fms; Watering Place, Gorgona 

 Island, Colombia, 35 fms. 



Genus POGILLOPORA Lamarck 



Pocillopora Lamarck (1816), Hist. Nat. Anim. sans Vert., vol. 2, p. 



273; Vaughan (1918), Carnegie Inst. Wash., Pub. Dept. Mar. 



Biol., vol. 9, p. 75. 

 Pocillipora Lamarck, Verrill (1870), Trans. Conn. Acad. Arts Sci., 



vol. 1, p. 519. 



