90 PKOCEEDINGS OF THE NATIONAL MUSEUM vol.83 



Family ACROPORIDAE Verrill 

 Genus MULTICOLUMNASTRAEA Vaughan, 1899 



MULTICOLUMNASTRAEA CYATHIFORMIS (Duncan) 



Heliastraea exsculpta Duncan (non Reuss), in Duncan and Wall, 1865, pp. 7, 



8, 11; 1868, p. 24. 

 Heliastraea cyathiformis Duncan, in Duncan and Wall, 1865, pp. 7, 8, pi. 1, 



figs, la, b; 1868, p. 24. 

 Multicolumnastraea cyathiformis Vaughan, 1899, p. 236, pi. 38, fig. 1; 1919, 



pp. 194, 486.— Felix, 1925, pp. 252-253. 



Occwrrence. — In the riidistid limestone in the Logie Green section, 

 Jamaica (Trechmann collection). 



Remarks. — One very poorly preserved specimen from the Trech- 

 mann collection is referred to this species. It is a low-branching 

 corallum with short stubby branches, which are usually compressed, 

 with average diameters of 8 by 10 mm, closely packed together. 

 The corallites are somewhat smaller than in the specimens described 

 by Vaughan. Vaughan gives an average diameter of 2 mm, whereas 

 in the specimen examined by the author they are rarely more than 

 1.25 mm. The intercorallite areas are crossed by the septo-costae 

 when the corallites are close together; when they are distant the 

 costae merge into a porous, reticulated coenenchyme. 



Gerth (1928, p. 3) has described a species of this genus, M. parvula, 

 from the Upper Cretaceous of Curasao, which has calices not over 

 1 mm in diameter. 



Vaughan (1919, p. 486) states that MuLticolirnivriastraea is very 

 close to Actinmns, the main point of distinction being the presence 

 of several coarse columellar tubercles in the former. 



Family PORITIDAE Dana 

 Genus GONIOPORA Blainville, 1830 



GONIOPORA REUSSIANA (Duncan) 



Plate 4, Figitrk IS ; Plai"e 5, Figurks 4, 5 



Pontes reussiana Duncan, in Duncan and Wall, 1865, p. 8, pi. 1, fig. 2 ; 1868, 



p. 25.— Vaughan, 1899, p. 249. 

 Ooniopora Jamaica^ 1 Beenard, 1906, p. 159. 



Plesiotype.—VS.'^M. no. 74490. 



Occurrence. — In the Upper Cretaceous limestones in the Cam- 

 bridge-Catadupa railway cut, Jamaica (Trechmann collection). 



Reinarks. — One specimen from the Trechmann collection is a 

 good example of this poorly known species. The form of the coral- 

 lum and size of the calices agree well with Duncan's description. 



