344 BULLETIN 103, UNITED STATES NATIONAL MUSEUM. 



pressed branches, it has no verrucae, the cahces are rather deep, the 

 septa are perpendicular ridges down the inside of the cahcular walls, 

 and there is no trace of a columella. In these characters the two are 

 similar. The species from Antigua differs from P. arnoldi by having 

 larger cahces, lesser diameter 1 mm. or more, usually more than 1 mm., 

 and the calicular margin is rather persistently marked by a sHghtly 

 raised acute rim. A description of the species from Baracoa, Cuba, 

 follows. 



POCILLOPORA BARACOAENSIS, new species. 



Plate 77, figs. 1, la. 



This species may be characterized as follows: 



The corallum is branching; it has no verrucae and no colimiellar 

 tubercle. The branch is regularly subcircular or broadly elliptical 

 in cross section, 10.5 mm. in diameter at lower end. The calices are 

 very shallow and are subcircular in outline, about 0.75 mm. in 

 diameter, distance apart usually sUghtly more than the calicular 

 diameter. Thick short septa join the columellar plug to the wall. 

 Coenenchyma very dense. 



These characters are different from those of any of the other known 

 American species. 



Locality and geologic occurrence. — Cuba, station 3476, in yellow, 

 argillaceous marl, Baracoa, associated with StylopTiora granulata 

 Duncan, collected by T. W. Vaughan. The geologic horizon of this 

 species is that of the Bowden marl. 



Type.— 'No. 324783, U.S.N.M. 



POCILLOPORA GUANTANAMENSIS, new species. 



Plate 77, figs. 2, 2a. 



Corallum composed of irregularly shaped, more or less compressed 

 and contorted branches, among which there is considerable anas- 

 tomosis. The branches may be as much as 27 mm. wide, 7.5 mm. 

 thick near the summit, and 12 mm. thick at the base. The branch 

 on which these measurements were made is 41 mm. long. Verrucae 

 entirely absent on the type. 



Calices from 0.75 to 1.25 mm. in diameter; usually less than or 

 about their diameter apart. They are deep pits without any trace 

 of septa, except that in a few calices what appear to be thick direc- 

 tives are recognizable on the plug forming the calicular floor. Calicu- 

 lar margins usually even with the coenenchymal surface; in some 

 calices they are somewhat tumid and slightly elevated. 



The columella is only a plug. Stout, horizontal tabulae present. 



Coenenchyma very dense. Surface in type worn, but apparently 

 beset with spines or granulations and not costulate. 



Locality and geologic occurrence. — Cuba, station 7514, about 5 

 miles nearly due east of Monument H4 on the east boundar}^ of the 



