100 CONTRIBUTION TO THE PALEONTOLOGY OF TRINIDAD 



Calyptrcea trochiformis Deshayes, Coq. fos. bas. Pans, II, p. 30, pi. 4, figs. 1,2,; 

 Infundibulum urticosum Conrad, Fos. Shells Tert. Form., 1st ed., No. 3, p. 32, 1 

 Infundibulum trochiformis Conrad, Fos. Tert., 2d ed., p. 46, pi. 16, fig. 18, 1835. 

 Trochita alta Conrad, Wailes, Geol. Miss., p. 289, pi. XV, figs. 3a, 3b, 1854. 

 Calyptrcea (Trochita) trochiformis Heilprin, Proc. Acad. Nat. bci. Pnila., vol. 31 

 ? Galerus olindensis White, Arch, do Museu Nac. do Rio de Janeiro, vol. VII, pp. 16' 



Calyptrcea trochiformis Dall (pars), Trans. Wagner Inst. Sci., vol. Ill, pp. 352- 



1879. 



Calyptrcea trochiformis Vaughan, U. S. Ueol. feurv., uuii. lm, p. ou, i»yo. 



Calyptrcea aperta Harris, Bull. Am. Pal., vol. Ill, p. 84, pi. 11, figs. 13-16, 1899. 



Calyptrcea aperta Clark, Eocene Rept. Maryland Geol. Surv., p. 152, pi. XXVIII, figs. 4, 5, 1901. 



Solander's original description.— " Trochus (apertus) testa gibboso-conica 

 exasperata obliquata subtus concava, apertura angustata. 



" Primo intuitu Patellis assimilatur illisque quae Labio inter no instructs sunt, 

 cfr. Linn. Syst. nat. n. 654-658. Specimina autem perfecta spiram ostendunt 

 completam, anfractus licet pauciores quam in congeneribus ; Apertura etiam magis 



contracta est. 



"Testa magnitudine Juglandis sed depression saepeque minor; tabula im- 



posita conum formans gibbosiusculum , quo etiam a congeneribus differet; externe 



scabra, subtus leavis, concava. 



"Apertura angustata, lateribus magis roduntatis quam in reliquis hujus 



generis." 



Remarks.— This shell, which was first described from the Barton beds in 

 southern England, is also in the Eocene of the Paris basin, and in that of the 

 Atlantic and Gulf States of North America. 



The Soldado shell corresponds closely to young specimens from Vicksburg, 



Mississippi. 



In 1887 Dr. White described Galerus olindensis from the town of Olinda, and 

 the Rio Maria Farinha beds, both in the State of Pernambuco, Brazil. This is 

 probably identical wth C. aperta, although the peculiar sagging outward of the 

 last whorl (which however was probably an individual and not a specific char- 

 acter) makes a positive identification of Dr. White's shell impossible. 



The vertical as well as the geographical range of this species was wide, for 

 it occurs in the Eocene, Oligocene and Miocene formations. 



Locality.— Bed No. 2, Soldado Rock, Gulf of Paria, near the Serpent's Mouth. 



Geological horizon. — Midway Eocene. Equivalent to the Midway of Alabama 

 and of the Rio Maria Farinha beds, State of Pernambuco, Brazil. 



Calyptraea centralis Conrad. Plate XIII, Figure 6. 



Infundibulum centralis Conrad, Am. Jour. Sci., XLI. p. 348. 1841; Medial 

 fig. 5, 1845. 



Trochita Collinsii Gabb, Jour. Acad. Nat. Sci. Phil., 2d ser. IX, p. 249, pi. I 

 Infundibulum Candeana d'Orb., Moll. Cuba. II. d. 190. d1. XXIV. figs. 28, 



1845. 



Calyptrcea centralis Dall, Trans. Wagner Inst. Sci., vol. Ill, pp. 353, 354, 1892. m4 



Calyptrcea centralis Martin, Maryland Geol. Surv., Miocene, p. 248, pi. LIX, figs. 2a, /d, * c > 



Conrad's original description. — " Obtusely ovate, with fine concentric irregu a 



lines; apex central 



n 



Remarks .—This widely distributed species is found in the Olig 





