NO. 1 DURHAM, BARNARD: EASTERN PACIFIC STONY CORALS 45 



The holotype is comparable to Vaughan's figures (1918, pi. 56, figs. 

 3, 3b) but has thinner and more exsert septa and less septa per calice. 

 Vaughan's fig. 3a does not represent any calices found on the new species. 



Although this species has only slight resemblance to the figured holo- 

 type of Pseudocolumnastraea, it is nevertheless provisionally referred to 

 that subgenus because of the distinct thecal vv^alls separating the corallites. 



Dimensions of holotype: Height 45 mm, length 65 mm, width ZZ 

 mm, diameter of a calice 1.5 mm. 



Holotype: AHF no. 2. 



Type locality: Sta. 47-33, Barrington Island, Galapagos Islands, 

 2 fms. 



Material examined: Stas. 30-33 (1 beach-worn specimen), 47-33 

 (1). Bottom sample 503 (frag.). Cat. nos. 16.1-16.3. 



Distribution: The Galapagos Islands, shore to 2 fms; the bottom 

 sample record is from La Libertad, Ecuador, 19 fms. 



