FOSSIL CORALS FROM WEST INDIES WELLS 



81 



fungid nature. It is most closely related to Podoseris Duncan, a 

 genus possessing the same general structure but differing by being an 

 attached form with uniting septa and a rudimentary papillary col- 

 umella. It differs from Antilloserls Vaughan by having a thin 

 epitheca, dissepiments, and a columella. Microsmilia Koby has a 

 fasciculate columella, lacks dissepiments, has a folded or reflexed 

 wall, as in Trochoserls, and is sessile in habit. 



VAUGHANOSERIS CATADUPENSIS, new species 



Plate 3, Figubes 11-13 ; Plate 5, Figure 3 



Desci'iption. — Corallum simple, low, depressed conical in shape, 

 slightly elliptical in outline, with a small central, nipple-shaped scar 

 of early attachment on the base. The exterior is partially covered 

 by a thin epitheca, which is easily eroded away and through which 

 the septo-costae are distinct. The septo-costae are acute, equal, thin, 

 beaded on their edges, and united by a well-developed exotheca and a 

 few synapticulae. The wall is indistinct, irregularly perforate, dis- 

 sepimental in origin, and separated from the epitheca by the exotheca, 

 which may be as much as 1 mm in tliickness. The calice is shallow, 

 with a central elongate columellar fossette. The septa are imper- 

 forate, exsert, laminar, straight, not uniting inwardly, and arranged 

 in 6 complete cycles (192 septa). Those of the first and second cj^cles 

 are equal, lightly dentate on their upper margins, laterally granulated 

 in close vertical rows and extending to the columella. The remaining 

 septa are regularly shorter and thinner according to their cycle, 

 with their upper margins notched by strong teeth. The columella is 

 spongy, well developed, hlling the bottom of the fossette. The 

 synapticulae are not numerous, occurring mostly near the wall. En- 

 dotheca present but not abundant. 



Measurevienfs. — As follows : 



Type.—U.S.'^M. no. 74485. 



Paratype.— [J. ^.'^M. no. 74486. 



Occurrence. — Specimen 1 is from a locality near Catadupa ; speci- 

 men 2 comes from the equivalent of the Providence shales under- 

 lying the rudistid limestone in the Cambridge-Catadupa railway 

 cut (Trechmann collection). 



