NO. 1 DURHAM, BARNARD: EASTERN PACIFIC STONY CORALS 63 



"The coralla consist of clusters of broad, low, cylindrical corallites, 

 which are distant about their own diameter and connected by stolons or 

 a thin basal expansion. Calicles not so deep as wide, cup-shaped, with a 

 narrow papillose columella, forming the bottom. Septa from thirty-six 

 to fifty, subequal, the primaries often a little broader, and those of the 

 last cycle narrower than the rest. All are rounded at the top, and finely 

 toothed, but at the middle the inner edge becomes more nearly perpen- 

 dicular and has longer teeth, resembling pali, which blend with the 

 papillae of the columella, which are fine and numerous. The tops of the 

 septa are thin and project slightly above the wall, the primaries most so. 

 Their sides are not so strongly granulated as in the preceding species, 

 and they appear thinner and less crowded. Exterior granulated, slightly 

 costate near the summit, often encrusted with Bryozoa, etc., to near 

 the top. 



"Diameter of the cups .18 to .22; height .10 to .15 of an inch. 



"Panama and Pearl Islands, not common, — F. H. Bradley. 



"Resembles the last [Astrangia {Astrangia) pulchella] but has much 

 larger cells and more numerous septa, which are not so strongly granu- 

 lated." 



Remarks: The lectotype has the extrathecal areas covered with 

 Bryozoa, usually up to the top of the calices. Examination of occasional 

 corallites which are not so heavily encrusted shows the presence of dis- 

 tinct costae running to the base of the corallite and out over the basal 

 expansion. Occasional corallites lack costae except for lines of granules 

 which may be separated at the base into broad, rounded cords. The type 

 consists of a cluster of closely aggregated corallites encrusting on a rock. 

 The corallites of A. (Astrangia) caboensis Durham, encrusting on a 

 gastropod shell, are separated by a broader basal expansion but otherwise 

 differ in no respect from A. {Astrangia) concinna Verrill. 



Lectotype: (here designated). Peabody Museum of Natural His- 

 tory Type no. 602, a group of corallites. 



Type locality: Panama, F. H. Bradley, collector. 



Material examined: The lectotype, and a specimen from Sta. 275- 

 34 (l).Cat. no. 25.1. 



Distribution: Sta. 275-34 is West of islets off Navidad Head, 

 Tenacatita Bay, Mexico, 25-35 fms. 



Astrangia (Astrangia) coronadosensis Durham 



Plate 7, fig. 35 



Astrangia {Astrangia) coronadosensis Durham (1947), Geol. Soc. Am., 

 Mem. 20, p. 27, pi. 4, figs. 3, 4. 



