FOSSIL CORALS FROM WEST INDIES WELLS 



101 



ways 24 in number, forming three complete cycles. The septa of 

 the first cycle are free, extending nearly to columella, two larger 

 ones lying in the same plane and dividing the corallite. The inner 

 ends of the third cycle fuse near or at the inner ends of the second 

 cycle, which is equal in length to the first. The full number of pali 

 is 12, arranged in two crowns, but several of them may be missing. 

 The interseptal loculi are open. The columella is styliform, well 

 developed, often slightly compressed in the same plane as that of 

 the two directive septa. 

 Measuremen ts. — As follows : 



Specimen 



1 (type) 



2 (paratj'pe). 



Length 



Mm 

 114.5 

 76 



Width 



Mm 



Maximum 

 height 



Mm 



Type.—SJ.S.'^M. no. 41294. 



Occurrence. — Both specimens are from the Velates schmiedeliana 

 bed of the Yellow limestone at Spring Mount, Jamaica (Trechmann 

 collection). 



Remarks. — This species may be distinguished from A. alabainiensis 

 (Vaughan) (1900b, p. 194; 1919, p. 486) (middle Oligocene), to 

 which it is probably related, by the presence of three complete cycles 

 of septa and styliform columella,^, alabaimensis having but 20 septa 

 and a columella composed of septal processes. 



ACTINACIS EARRETTI, new species 



Plate 4, Figures 1, 2 



Description. — Corallum branching, basal portion unknown, the 

 branches compressed and blunt. The average thickness is 6 mm, 

 and the width varies from 7 to 8 mm. The type represents a branch 

 that bifurcates 32 mm from the lower extremity, and each of the 

 branches thus produced again divides. The corallites are small, 

 not more than 1 mm in diameter, slightly projecting, and separated 

 by less than their own diameter of coenenchyme. The coenenchyme 

 is perforate, synapticulae uniting the perforate septo-costae to form 

 a porous reticulum. Corallite walls very little developed, a few 

 synapticulae forming a peripheral ring by uniting the swollen outer 

 ends of the septa. Between the wall and the surrounding coenen- 

 chjaiie is an interspace traversed by nothing except a very few 

 trabecular expansions uniting the septa and septo-costae. The full 

 number of septa is 24, arranged in three complete cycles as in A. 



