8 



PROCEEDINGS OF THE NATIONAL. MUSEUM 

 Faunal list 



VOL. 66 



' Identified by Dr. Ray Bassler, of the U. S. National Museum. 



The fauna from Springvale is tentatively referred to the upper 

 Miocene. This fauna is of special interest because it contains certain 

 species that indicate a closer relationship to the Recent fauna of the 

 Pacific side than to the Atlantic, The two forms especially noted 

 among the gastropods that indicate this relationship are Tumtell^ 

 planigyrata, a species analogous to Turritella hroderipiana Orbighy ; 

 and Vermicularia, species, a form analogous to Vermicularia ebur- 

 neus Reeve. Not only do the gastropods indicate this analogy but 

 the pelecypods as well. 



Only one of the species in my list from Springvale occurs in the 

 list from Brasso. Guppy ^ records the species occurring at Spring- 

 vale, illustrates by diagram the general relation of the stratum 

 carrying this fauna to the other beds, and gives a brief discussion 

 of the faunal characteristics. He assigns the fauna collected at 

 Springvale to the Miocene. 



* Fossils from Springvale, near Couva, Second Report Agr. See. Trinidad and Tobago. 

 (Society Paper No. 454). 1911. 



