TRANSACTIONS OF WAGNER 

 1358 



TERTIARY FAUNA OF FLORIDA 



Myrtsea curta Conrad. 



Cyclas Curta Conrad, Am. Journ Conch., i., p. 8, 1865 (name only) ; pp. 139, 212, pi. xx., 



fig. 14, 1865 (Jacksonian). 



Lucina curta Conrad, S. I. Checkl. Eoc. Fos., p. 24, 1866. 

 Lucina choctavensis O. Meyer, Bull. Ala. Geol. Surv. No. i, p. 81, pi. i., fig. 28, 1886 



(Vicksburgian). 

 Lucina Uhleri Clark, Johns Hopkins Univ. Circ., xv., p. 5, 1895 ; Bull. U. S. Geol. Surv. 



No. 141, p. 79, pi. xxi., figs, i a-i d, 1896; Maryl. Geol. Surv., Eocene, p. 176, pi. 



xxxvii., figs. 4-7, 1901. 

 Lucina Ulrichi Harris, Bull. Am. Pal. No. 9, p. 71, pi. xiv., fig. 4, 1897 (lapsus for Uhleri). 



Chickasawan. 



Eocene and Oligocene from Chickasawan to Vicksburgian. Wood's Bluff 

 and lower bed at Claiborne Bluff, Alabama ; Montgomery, Louisiana ; Jack- 

 son, Garland's Creek, Ucutta Creek, Carson's Creek, Wahtubbee Hills, and Red 

 Bluff, Mississippi ; Jacksonian of Arkansas ; Aquia and Nanjemoy formations 

 at numerous localities in Maryland. 



Specimens from many localities do not seem to differ even varietally from 

 the Chickasawan horizon to the Vicksburgian, but so far I have seen no speci- 

 mens from the Claibornian. 



Myrtsea limoniana n. sp. 

 PLATE 52, FIGURE 10. 



Oligocene of Bowdcn, Jamaica; Pliocene of Limon, Costa Rica. 



Shell small, thin, subequilateral, somewhat longer than high, only moder- 

 ately convex, though hardly compressed ; beaks small and low ; lunule de- 

 pressed, narrow, sublanceolate, small ; surface covered with fine, sharp, thin, 

 elevated, concentric lamellae, separated by wider interspaces and more elevated 

 near the dorsal margins, especially behind the beaks, where in perfect specimens 

 five or six of them are produced as small leaflets, which, however, are usually 

 broken off; hinge with a single right and two left cardinal teeth, the laterals 

 obsolete ; scars normal ; the margin of the valves entire. Alt. 8, Ion. 9, diam. 

 4 mm. 



This species, though very similar, is more elongated, less elevated, and more 

 densely lamellose than M. curta. From the M. pristiphora Dall and Simpson, 

 the recent representative of the group in the West Indies, it differs by its more 

 quadrate-elongate form, thinner shell, and more delicate and sparser concentric 

 lamellae. 



