NO. 4 ECHINOIDS, TRINIDAD AND VENEZUELA — COOKE 33 



Plate 3 



Figs. 1-3. Oligopygus haldemani costnlijormis Jeannet (p. 11). 



Top view X li aiad bottom and right-side views X i of USNM 



638626. From the San Fernando formation, of late Eocene age, 

 at the Bella Vista quarry, Trinidad. 



Figs. 4-6. Oligopygus rotundiis Cooke (p. 12). 



Top and bottom views X 2 and right-side view X i of USNM 

 638625. From the Tinajitas formation, of late Eocene age, at 

 Alta Casa Nueva, north of Altagracia de Orituco, Guarico, 

 Venezuela. 



Figs. 7-8. Wcisbordella mirabilis (Jackson) (p. 20). 



Top view X 2 and bottom view X i of holotype, USNM 328247. 

 From the San Fernando formation, of late Eocene age, on the 

 Bella Vista Road, Mount Moriah, San Fernando, Trinidad 

 (USGS 8878). 



Figs. 9-11. Oligopygus wetherhyi kugleri Jeannet (p. 11). 



Top view X ij and bottom and left-side views X i of USNM 



638627. From the San Fernando formation, of late Eocene age, 

 at Soldado Rock, Trinidad. 



Plate 4 



Figs. 1-6. Fibularia jarallonensis Cooke, n. sp. (p. 16). 



1-3, Top, left-side, and bottom views X 5 of holotype, USNM 



638629a. 

 4-6, Top, left-side, and bottom views X 5 of paratype, USNM 

 638629b. 

 From a reef facies of the Navet formation, of middle Eocene age, 

 on Farallon Rock, near San Fernando, Trinidad (USGS 9199)- 

 Figs. 7-1 1. Haimea ovum-serpentis (Guppy) (p. 14). 



7, Top view X I of USNM 115392a. 



8, Bottom view X i of USNM 115392b. 



From the St. Bartholomew limestone, of late (?) Eocene age, 

 on St. Bartholomew, B.W.I. 



9-1 1, Top and bottom views X li and right-side view X i of 

 USNM 638628. 

 From the San Fernando formation, of late Eocene age, on Bella 

 Vista Road at Mount Moriah, near San Fernando, Trinidad 

 (USGS 8878). 



Plate 5 



Figs. 1-2. Lytechinus variegatus (Leske) (p. 10). 



1, Bottom view X i of USNM 638624a. 



2, Top view X I of USNM 638624b. 



From the San Gregorio formation, of Pliocene age, in the Rio 

 Seco area. Falcon, Venezuela. 

 Fig. 3. Clypeaster rosaceus (Linnaeus) (p. 16). 



Top view X I of USNM 638630. From beds of Miocene age in 

 the Goajira Peninsula, Zulia, Venezuela. 



