CONTRIBUTION TO THE PALEONTOLOGY OF TRINIDAD. 103 



It varies in size, but the specimens all show the same characteristics in other 

 respects and apparently are all the same species. 



An Amauropsis was described by Professor Harris from the upper Claibornian 

 Eocene of Texas 85 as A. singleyi. This species is closely allied to A. smithiana. 



The writer takes great pleasure in naming this shell in honor of Mr. Edward 

 Eggleston Smith, of the Geological Survey, Washington, D. C. 



Locality. — Bed No. 8, Soldado Rock, Gulf of Paria. 



Geological horizon. — Lignitic Eocene. 



Genus LIOTIA Gray, 1842. 

 Liotia lillianae new species. Plate XIII, Figure 14. 



Description. — Shell small, rather solid, depressed-conic; whorls convex, four, 

 of which the uppermost is nuclear and smooth, the rest being ornamented with 

 granulated threads, last volution with three such granulated or finely beaded 

 threads followed by a much stronger basal carina, and that by a subbasal ridge 

 about equal in size to the carina; surface more or less reticulated by the inter- 

 section of the revolving beaded threads by transverse, oblique lines of growth; 

 suture deeply channelled. 



Height of shell 3, greatest breadth 4 mm. 



Remarks.— This pretty shell is of much the same shape and size as the only 

 known Eocene species, L. granulata Lea, 86 from the Claiborne and Lignitic of the 

 Southern states. But on comparing it with specimens of Lea's species, the 

 sculpture is found to be quite different. 



The genus Liotia was rare in the Eocene, but became more abundant in the 

 later Tertiaries of Florida; and is now represented by about a dozen species in 

 the recent Floridian and Antillean faunas. It also flourishes on the coasts of 

 Australia and the Philippines. 



The Soldado species is dedicated to Mrs. E. E. Smith, of Washington, D. C. 

 Locality.— Bed No. 8, Soldado Rock, Gulf of Paria. 

 Geological horizon. — Lignitic Eocene. 



Class SCAPHOPODA. 



DENTALIUM 



i 



58. 



Dentalium microstria Heilprin. Plate XIII, Figure 15. 



Dentalium microstria Heilprin, Proc. Acad. Nat. Sci. Phila., p. 375, pi. 20, fig. 3, 1880. 

 Dentalium microstria Dall, Trans. Wasrner Inst., vol. III. nn. 438. 439. 1892. 



microstria 



Dentalium microstria Harris, Bull.' Am.' Pal) vol*. Ill,' pp. 3-4, pi.' i,' fig. I, a, 1899. 



Heilprin' s original description .—" Shell slender, considerably curved and 



greatly attenuated, faintly striated, the striae most conspicuous on the attenuated 



portion; posterior aperture entire, there being no fissure; anterior aperture 

 circular. 



a 



Length \y 2 to 2 inches." 



Cont. to Geol., p. 122, pi. 4, fig. Ill, 1833. 



12 





