NO. 1 DURHAM, BARNARD: EASTERN PACIFIC STONY CORALS 73 



third cycle reaching about half way; inner ends of first and second 

 cycle septa with one and occasionally two well-developed paliform lobes, 

 the topmost lobe being better developed, third cycle of septa dentate; 

 first cycle septa most exsert (0.75 mm), second cycle less so, third cycle 

 about half as exsert as first cycle, septa well-rounded at top ; septal faces 

 coarsely granulated, granules near inner edges of septa becoming shelves 

 parallel to upper edges of septa; coarseness of granules gives interior 

 of calice a very crowded appearance; costae very low and broad, corres- 

 ponding to septa, covered with numerous fine granules, interspaces very 

 narrow and shallow ; columella composed of about 6 anastomosing pali- 

 form lobes from deep within the calice. 



Remarks: This species may be separated from A. {Astrangia) 

 pulchella Verrill by the smaller size of the third cycle septa and the 

 exsert character of the septa. It is separated from A. {Astrangia) 

 howardi, new species by the much shallower calices, the heavier, more 

 crowded septa and the better developed paliform lobes. It is rather close- 

 ly related to A. {Astrangia) santelmoensis Durham but differs in the 

 lesser number of septa, as well as having all the septa more exsert than 

 in the latter. 



Di?nensions of corallite: Height 7 mm, diameter 2.5 mm, depth 

 of calice 1 mm. 



Holotype: AHF no. 9. 



Type locality: Sta. 948-39, off Medidor Island, Bahia Honda, 

 Panama, 30-35 fms. 



Material examined: Sta. 948-39 (1). Bottom samples 329 (1 worn 

 specimen), 453 (1 worn specimen). Cat. nos. 33.1-33.3. 



Distribution: The type locality and questionably in the Galapagos 

 Islands and Cocos Island, 35-46 fms. 



Astrangia (Astrangia) howardi Durham and Barnard, 



new species 

 Plate 7, fig. 33 



Corallites small, elongate, slender, forming a subphaceloid, arbore- 

 scent aggregate; individual corallites ranging from 4-10 mm in length 

 and usually varying from 2-3 mm in diameter; numerous individuals 

 with repeated calicular rejuvenation are present, so that the resulting 

 compound corallites may have lengths up to 20 mm ; depth of calices 2.0- 

 2.75 mm; septa 22-30 in number, usually 24-26, septal interspaces 1.5- 

 2.0 times as wide as the thickness of the primary septa; first cycle septa 

 moderately exsert (0.5-0.75 mm), others less so; first and second cycle 

 septa equally prominent, third and occasionally fourth cycle members 



