106 PEOCEEDINGS OF THE NATIONAL MUSEUM vol.83 



Genus ASTEROSMILIA Duncan, 1867 



ASTEROSMILIA species cf. A. HILLI Vaughan. 1919 



Specimen.— U.S.lHiM. no. 44303. 



Occurrence. — In a conglomerate band in the Scotland beds on the 

 Spa Estate, 2 miles southwest of Bissex Hill, Barbados (Trech- 

 mann collection). 



ReTncorks. — One specimen is placed in affinity with this species. 

 The onl}^ differences between it and typical specimens from the 

 Dominican Republic are that the wall is somewdiat thicker and the 

 costae more regularly alternating in size in the Barbados specimen. 



A. Idlli Vaughan (1919, p. 355) occurs in the Miocene of Costa 

 Rica, Jamaica, and the Dominican Republic. 



Genus PAVONA Lamarck, 1801 



PAVONA species 



Plate 4, Figure 17 



Description. — The specimen is a single much-worn fragment of 

 a unifacial frond, measuring 20 by 25 by 12 mm. The noncalicular 

 surface bears alternating costae numbering 8 to 10 in a space of 

 2 mm. The worn calicular surface bears scattered calices, which 

 range from 1.5 to 2 mm in diameter, separated by a distance of 3.5 

 to 4 mm between centers, united by regularly alternating septo- 

 costae. The centers are circumscribed by a ring of strongly de- 

 veloped synapticulae separating them from the intercorallite areas. 

 Within the calices there are from 20 to 24 septa, about 10 of which 

 extend to the columella. The columella is trabecular, formed by 

 the fused inner ends of the longer septa. 



Specimen.— {J.^.'H.M. no. 44304. 



Occurrence. — In a conglomerate band in the Scotland beds on the 

 Spa Estate, 2 miles southwest of Bissex Hill, Barbados (Trechmann 

 collection). 



Remarks. — This specimen probably represents a new species of 

 Pavona., but the material is too scanty for further treatment. P. 

 panamensis Vaughan, from the upper Oligocene of the Canal Zone, 

 differs by having larger calices in definite series with subequal, 

 larger septo-costae. P. pennyi Vaughan, from the Miocene of 

 Trinidad, has larger calices with fewer main septa and a larger 

 total number of septa as well as a compressed styliform columella. 



Pavona occurs in the upper Oligocene and Miocene of the Carib- 

 bean region and is living in the Indo-Pacific. 



