TRANSACTIONS OF WAGNER 



TERTIARY FAUNA OF FLORIDA 



of the Natural Well and Magnolia, Duplin County, North Carolina, and of the 

 Darlington district. South Carolina. 



This form seems to be properly separated from the P. pensylvanicus L., for 

 the reasons assigned by Conrad. 



Phacoides (Here) pensylvanicus LinniS. 

 Venus pensylvanica Linne, Syst. Nat, ed. x,, p. 688, 1758; not of Tuomey and Holmes, 



1856. 

 Lucina pennsylvanica Reeve, Conch. Icon., vi., Mon. Lucina, pi. vi., fig. 29, 1850. 

 Lucina grandinata Reeve, Conch. Icon., vi., Mon. Lticina, pi. vi., fig. 29 (note), 1850. 

 Lucina speciosa Reeve, op. cit., pi. vi., fig. 32, 1850; not of Rogers, Trans. Am. Phil. Soc, 



1836. 



Pliocene marls of the Caloosahatchie, Shell Creek, and Alligator Creek, in 

 south Florida; Pleistocene of Barbados (Damon) and other localities in the 

 West Indian region ; living from Cape Hatteras, North Carolina, southward 

 throughout the West Indies and adjacent shores. 



This well-known species does not appear in its typical form to antedate the 

 Pliocene in a fossil state. 



Section Pleurolucina Dall. 

 Phacoides (Pleurolucina) quadricostatus n. sp. 

 Plate 50, Figure 7. 

 Oligocene marl of Bowden, Jamaica ; Henderson and Simpson. 

 Shell small, plump, oblique, high, short, with strongly impressed large dor- 

 sal areas ; beaks small, prosogyrate, overhanging a very small cavernous lunule ; 

 ligament short ; surface densely covered with high, concentric lamellae with 

 slightly wider interspaces, the distal edges of the lamellae wider and reflexed 

 dorsally ; radial sculpture of four rapidly distally widening broad ribs sepa- 

 rated by narrow sulci, the two inner ribs wider than the outer pair; hinge 

 normal, strong ; scars normal ; inner margins of the valves crenate. Alt. 9, 

 Ion. 6, diam. 7 mm. 



This is doubtless the precursor of the following species and of the recent P. 

 leucocyma Dall. 



Pbacoides (Pleurolucina) amabiUs Dall. 



Plate 25, Figures 9, 9a. 



Lucina {Here) amabilis Dall, Trans. Wagner Inst., iii., p. 920, pi. xxv., figs. 9, 9 a, 1898. 



Pliocene marls of the Caloosahatchie and Shell Creek ; Dall and Burns. 



