100 CONTRIBUTION TO THE PALEONTOLOGY OF TRINIDAD. 



r H 



SN 



r°y 



E<iJ 



5NI 





ES 



•I 





Calyptrcea trochiformis Deshayes, Coq. fos. bas. Paris, II, p. 30, pi. 4, figs. 1, 2, 3, 1824. 



Infundibulum urticosum Conrad, Fos. Shells Tert. Form., 1st ed., No. 3, p. 32, 1833. 



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. Sci. Phila., vol. 31, p. 219, 1879. 



? Galerus olindensis White, Arch, do Museu Nac. do Rio de Janeiro, vol. VII, pp. 167-168, pi. XVIII, 



figs. 15, 16, 1887. 

 Calyptrcea trochiformis Dall (pars). Trans. Wagner Inst. Sci., vol. Ill, pp. 352-353, 1892. 

 Calyptrcea trochiformis Vaughan, U. S. Geol. Surv., Bull. 142, p. 50, 1896. 

 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 quse Labio interno instructs sunt, 

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

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

 eontracta est. 



"Testa magnitudine Juglandis sed depression ssepeque 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 Tert., p. 80, pi. 45, 

 fig. 5, 1845. 



Trochita Collinsii Gabb, Jour. Acad. Nat. Sci. Phil., 2d ser. IX, p. 249, pi. 35, fig. 39, 1845. 

 Infundibulum Candeana d'Orb., Moll. Cuba, II, p. 190, pi. XXIV, figs. 28, 29, 1842. 



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



Calyptrma centralis Martin, Maryland Geol. Surv., Miocene, p. 248, pi. LIX, figs. 2a, 2b, 2c, 1904. 



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

 lines; apex central.' ' 



Remarks.— This widely distributed species is found in the Oligocene of 



rr 



C/l 



1 5 N 



