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1359 



TERTIARY FAUNA OF FLORIDA 



Myrtsea (Eulopia) furcata n. sp. 

 Plate 52, Figure 13. 



Oligocene of the Bowden, Jamaica, marl; Henderson and Simpson. 



Shell thin, rounded, moderately convex, subequilateral ; beaks low, incon- 

 spicuous ; lunule long and narrow, moderately impressed, escutcheon almost 

 linear, bordered outwardly by a carina; surface near the beaks with delicate, 

 distant, slightly elevated concentric lines which become almost obsolete over 

 the middle and basal portions of the disk ; radial sculpture of fine, close-set, 

 rather flatfish threads, which towards the margins bifurcate and form a rather 

 widely divaricate and somewhat irregular sculpture ; hinge delicate, the right 

 laterals feeble, ligamentary groove distinct, rather short ; the adductor scars 

 large, normal ; the margins of the valves entire. Alt. 11. 5, Ion. 13, diam. 5 mm. 



This is larger, more delicate, and thinner than most of the group. Lucina 

 astartceforniis Aldrich, 1897, from the Claibornian of Alabama and the Nan- 

 jemoy formation of Maryland, is a species of Eulopia. 



Myrtssa (Eulopia) vermiculata n. sp. 

 Plate 52, Figure 5. 



Oligocene of the Bowden, Jamaica, marl, Henderson and Simpson ; Ballast 

 Point, Tampa Bay, Florida, Dall. 



Shell resembling M. sagrinata Dall, but shorter and more rounded ; moder- 

 ately convex, subequilateral, the anterior end slightly longer ; beaks low and 

 inconspicuous ; lunule narrow, concavely excavated ; the escutcheon linear, 

 longer ; both bounded externally by a serrate carina ; ligamentary groove about 

 half as long as the escutcheon; surface with slightly elevated, thin, concentric 

 lamellae, the interspaces radially sculptured with close-set vermiculate threads ; 

 hinge with the normal cardinal dentition and distinct right laterals ; adductor 

 scars rather small, the interpallial area punctate. Alt. 6.5, Ion. 7.5, diam. 3.5 

 mm. 



Genus PHACOIDES Blainville. 

 Phacoides Blainville, Man. Malac, i., p. 540, 1825 ; sole ex. Lucina jamaicensis Lamarck, 



Enc. Meth., pi. cclxxxiv., fig. 2. 

 Lucina Lamarck, Syst. An. s. Vert., p. 124, 1801 ; not Lam., 1799; H. and A. Adams, 



Gen. Rec. Moll., ii., p. 466, 1857. 

 "^Lucina Schumacher, Essai, p. 164, 1817, ex. L. pensylvanica Lam. 

 <^Egraca Leach (dim), Moll. Gt. Brit., p. 210, 1852 ; = Lmciko Lam., 1818. 

 '^Miltha H. and A. Adams, Gen. -Rec. Moll., ii., p. 468, 1857; sole ex. Lucina Childreni 



Gray, Zool. Journ., i., p. 221, 1825; Thomson's Ann. Phil., xxv., p. 136, 1825 (as 



Tellina) . 



