GEOLOGY AND PALEONTOLOGY OF THE CANAL ZONE. 877 



fit nxactly, omitting tho remarks about the costae being covered by 

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

 are based on these specimens. 



PhyUocoenia scidpta 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), 

 (se(5 pi. 85, figs. 4, 4a), I submit the following description: 



Gorallum, a rather thick folium; the specimen liere described is 

 unfortunately ))roken 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- 

 vested with a coarsely wrinkled epitheca. 



The calicular margins are on tlie 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 com^plete cycles, primaries and secondaries 

 1; rger, and usually thicker, than the tertiaries, primaries average 

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

 ariv^s reach the columella. 



(•olumolla tral)ecular. 



Locality and geologic occurrence. — -Nivajc shale, Santo Domingo, t. 

 Duncan. 



Miss Maury obtained specimens in Santo Domingo as follows: 



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

 Siylophora granulata Duncan, Antillia hilobata Duncan, Orhicella hain- 

 hridgensis \&nghsin% Solenasfrea hournoni M. Edwards and Haime, 

 SyzygophyUia 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 intersepla (Esper), Orhicella cavernosa var. 

 cylindrica (Duncan), SyzygophyUia deniata (Duncan) ; zone not stated ,. 

 associated with Pocillopora crassoramosa, Thysanus grandis (Duncan), 

 and SyzygophyUia 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. Otlier corals collected there, including 

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

 noni M. Edwards and Haime, a species of Thysanus (aff. T. excen- 

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



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



