﻿GEOLOGY AND PALEONTOLOGY OF THE CANAL ZONE. 377 



fit exactly, omitting the remarks about the costae being covered by 

 epitheca. The figures presented on plate 85, figs. 2, 2a, 25, and 3, 

 arc based on these specimens. 



PhyUocoenia sculpla var. tegula Duncan. ^ As I do not find Dun- 

 can's description of this coral satisfactory, and as the authorities of 

 the Geological Society of London have kindly sent one of the original 

 specimens to the United States National Museum (No. 155274), 

 (see pi. 85. figs. 4, 4a), I submit the following description: 



Corallum, a rather thick folium; the specimen here described is 

 unfortunately broken on all its edges, its original dimensions are there- 

 fore unknown. Its present length is 62 mm. ; width 40 mm. ; greatest 

 thickness, 15.5 mm. ; thickness near outer edge 5.5 mm. Base in- 

 v^ested with a coarsely wrinkled epitheca. 



The calicular margins are on the same level as the flat exothecal 

 surfaces, or are very slightly raised. In form the calices are circular 

 or somewhat deformed. Diameter from about 2 mm., to 2.5 by 

 3.25 mm. ; distance apart, from 1 to 3 mm. Intercorallite areas with 

 costae, beaded on the edges, equal or alternating in size, correspond- 

 ing to all septa, those of one calice meeting those of the adjoining 

 calices. 



Septa usually in three complete cycles, primaries and secondaries 

 h rger, and usually thicker, than the tertiaries, primaries average 

 la/ger than the secondaries. All the primaries and most of the second- 

 aritis reach the columella. 



Columella trabecular. 



Locality and geologic occurrence. — Nivaje shale, Santo Domingo, t. 

 Duncan. 



Miss Maury obtained specimens in Santo Domingo as follows: 



Rio Cana, zone H, associated with Placocyaihus, new species, 

 Stylophora gra'nulata Duncan, AntiUia hilohata Duncan, Orhicella bain- 

 hridgensis Vaughan?, Solenasirea hournoni M. Edwards and Haime, 

 Syzygophyllia gregorii (Vaughan), and Siderastrea siderea (Ellis and 

 Solander). Rio Gurabo, zone D, associated with Stylophora affinis 

 Duncan, Madracis decaciis (Lyman), Pocillopora crassoramosa Dun- 

 can, Stephanocoenia intersepta (Esper), Orhicella cavernosa var. 

 cylindrica (Duncan), Syzygophyllia dentata (Duncan) ; zone not stated, 

 associated with Pocillopora crassoramosa, Thysanus grandis (Duncan), 

 and Syzygophyllia dentata (Duncan). 



I collected in 1901 a fine specimen of this species east of La Cruz, 

 at the crossing of the highway from Santiago to the Morro over the 

 railroad, near Santiago, Cuba. Other corals collected there, including 

 Stylophora species (probably S. affinis Duncan), Solenasirea hour- 

 noni M. Edwards and Haime, a species of Thysanus (aft'. T. excen- 

 iricus Duncan), Siderastrea siderea (Ellis and Solander), and Goniopora 



' Geol. Soc. London Quart. Journ., vol. 19, p. 4.32, 1833. 



