TRANSACTIONS OF WAGNER 

 968 



TERTIARY FAUNA OF FLORIDA 



Donax aequilibrata Dall. 



PLATE 28, FIGURE 17. 



Donax aquilibrata Dall, Nautilus, v., No. n, p. 126, 1892; Trans. Wagner Inst., iii., p. 

 923, pi. 28, fig. 17, 1898. 



Pliocene of the Cape Fear River, North Carolina, at Mrs. Guion's marl bed ; 

 C. W. Johnson. 



This species is not unlike D. fabagclloides Guppy (Proc. Sci. Assoc. Trini- 

 dad, Dec., 1867, pp. 62, 173), from the Pliocene of Matura, Trinidad, West 

 Indies, but is more angular and attenuated behind. 



Donax striata Linnet 

 Donax striata Linne, Syst. Nat., ed. xii., p. 1127, 1767; Guppy, Proc. Sci. Assoc. Trinidad, 



Dec., 1867, p. 162. 

 Donax fiexuosus Gould, Bost. Journ. Nat. Hist., vi., p. 395, pi. xv., fig. 8, 1853; not of 



Cooper, Cat. Cala. Fos., p. 238, 1888. 

 Donax Lamarckii Deshayes, Reeve, Conch. Icon., viii., pi. 5, fig. 37, 1855. 



Pliocene of Matura, Trinidad ; Guppy. 



It has long been a source of surprise that the Donax Hc.ntosa described 

 from specimens collected at Santa Barbara, California, by Colonel E. Jewett, 

 has never turned up since, as the species of this genus are known to be very 

 abundant when occurring at all. On a recent review of the recent Donaces 

 in the collection of the National Museum a comparison of one of Jewett's 

 specimens with specimens of Donax striata from the Antilles shows that the 

 two are identical. Several of Colonel Jewett's species are known to have been 

 confused as to locality, and there can be little doubt that this is another in- 

 stance where shells from some West Indian locality were mixed with Pacific 

 coast shells by some accident and described with an erroneous habitat. The 

 shell referred to by Cooper under the name of fiexuosus, from the Pliocene of 

 San Diego, California, is the original D. calif arnica of Conrad. 



Donax californica Conrad. 

 Donax californica Conrad, Journ. Acad. Nat. Sci. Phila., vii., p. 254, pi. 19, fig. 21, 1838; 



not of Carpenter and the majority of Californian authors, nor of Deshayes. 

 Dotmx navicula Hanley, P. Z. S., 1845, p. 15 ; Reeve, Conch. Icon., viii., pi. 4, fig. 18, 1855. 



Pliocene of the San Diego, California, Well ; Pleistocene of San Pedro 

 Hill and San Diego, Stearns and Dall ; recent from San Pedro, California, 

 south to Panama. 



This species grows slightly larger and has more tendency to radiating color- 



