AKT. 22 MIOCENE GASTROPODS AND SCAPHOPODS MANSFIELD 



The fauna at Springvale is believed to be much younger than 

 that in the Brasso beds and is assigned to the upper Miocene. 



LIST OF LOCALITIES AND FOSSILS 



LOWER MIOCENE 



List of stations 



8299. (Loc. 3) Caroni County, San Rafael Ward, Cumiito Road, 17 miles from 

 the Eastern Main Road (Gl° 13' 25" W. ; 10° 28' 30" N.). F. W. Penny, 

 collector. 



8301. (Loc. 5) Nariva County, Cliaruma Ward, Machapoorie Quarry (61° 14' 

 35" W. ; 10° 27' 25" N.). F. W. Penny and J. A. BuUbrook, collectors. 



The gastropod fauna at the above two stations shows close rela- 

 tionship and is believed to be the oldest fauna studied, the age of 

 which strongly indicates lower Miocene. 



TurriteUa machapoorensis Maury, is closely related to T. tampae; and T. 



caparonis Maury, is closely related to T. chipolana. Amauropsis trinitatensis, 



new species, resembles an Anguilla form; Modulus tamancnsis Maury (a 



much larger form also occurs at station 9219) is related to M. tcilcoxii, a 



Chipola species. 



Faunal list 



Stations 



8299 



8301; 

 9220 



Remarks 



Cypraea trinitatensis, new species. 

 Modulus tamancnsis Maury 



TurriteUa machapoorensis Maury. 



TurriteUa caparonis Maury 



TurriteUa afi. T. peraltenuata praecel- 



lens Pilsbry and Brown. 

 Amauropsis trinitatensis, new species.. 



CttUiostoma attrina, new species 



Liotia machapooriensis, new species 



Mostly poorly preserved specimens 



Closely related to M. wilcoxii Ball (Chipola). Also 



at sta. 9219. 

 AS. T. tampae Heilprin (The "silex beds" of the 



Tampa formation, Florida). 

 Afl. T. chipolana Dall. 



Resembles an undescribed form from Anguilla. 



Conus, species 



Ancilla, species 



Clava, species 



Cerithium, 2 species. 

 Serpulorbis, species . 



Natica, species 



Sinum, species 



Eunaticina, species. 

 Dentalium, species.. 



MIDDLE OR LOWER MIOCENE 



List of stations 



9027. Caroni County, Montserrat Ward, Brasso-Grun Couva Road, 100-200 

 yards west of Brasso. Fossiliferous clay immediately overlying Twr- 

 H<eZ?«-bearing limestone. J. A. Bullbrook, collector. 



9196. Caroni County, Montserrat Ward, junction of Gran Couva and Brasso- 

 Tabaquite roads. J. A. Bullbrook, collector. 



9215. Caroni County, Montserrat Ward, Brasso railway station. Steam wash. 

 J. A. Bullbrook, collector. 



8302. (Loc. 6.) Caroni County, Montserrat Ward, 1 mile south of Brasso rail- 

 way station (61° 19' 18" W. ; 10° 23' 45" N.). Flood-wash from 

 stream bank. F. W. Penny, collector. 



