TRANSACTIONS OF WAGNER 



1518 



TERTIARY FAUNA OF FLORIDA 



lamina, and a low, obscure anterior lamina parallel and close to the median ; a 

 lithodesma is present. 



Subgenus Heteroclidus Dall (nov.), 1903. Type Clidiophora punctata Conrad. 



Like Clidiophora, but the long left posterior lamina absent, the right pos- 

 terior lamina short, and the low anterior right lamina produced ; both the 

 anterior laminae end in front of the anterior adductor scar ; lithodesma present. 



Pandora and Kennerleyia are widely distributed, Ccelodon is exclusively 

 oriental, Clidiophora chiefly American on either coast, and Heteroclidus Cali- 

 ' fornian. 



Pandorella, Tnitiiia, and Calopodiiim are exact synonyms of Pandora s. s. 



Pandora (Kennerleyia) dodona n. sp. 

 Plate 57, Figure 25. 



Uppermost Oligocene sands of Oak Grove, Santa Rosa County, Florida; 

 Burns and Aldrich. 



Shell small ; left valve very convex, when adult somewhat twisted, attenu- 

 ated distally, with a slender, blunt rostrum ; anterior area defined by an obso- 

 lete sulcus and with the central area smooth ; posterior dorsal area bounded 

 below by a single radial thread and somewhat concentrically wrinkled, hinge- 

 plate normal, disk with the muscular impressions strongly marked ; right valve 

 slightly concave, with a strong posterior dorsal keel, concentrically striated 

 and with a few radial incised lines. Length 12.5 (to 15.0), height 5.2, diameter 

 2.0 mm. 



This species is somewhat like P. carolinensis Bush, but more slender and 

 more enrolled ; in fact, in the latter respect our other species, recent or fossil, 

 approach it closely only exceptionally. 



Pandora (Kennerlesria) arenosa Conrad. 

 Myadora arenosa Conrad, Proc. Acad. Nat. Sci. Phila., iii., p. 21, 1848. 

 Pandora arenosa Conrad, Journ. Acad. Nat. Sci. Phila., vii., p. 130, 1834 ; Fos. Medial 



Tert., p. 2, pi. i., fig. 3, 1838. 

 Pandorella arenosa Conrad, Proc. Acad. Nat. Sci. Phila., xiv., p. 572, 1863 ; Am. Journ. 



Conch., iii., p. 269, 1867, olim; Meek, Checkl. Mioc. Fos. N. Am., p. 12, 1864. 

 Pandora carolinensis Bush, Trans. Conn. Acad., v:., pt. ii., p. 474, 1885. 



Miocene of the York River, Virginia, near Yorktown, Harris : upper Mio- 

 cene of Duplin County, North Carolina, at Magnolia : Pliocene marls of Shell 

 Creek, Florida ; living off Cape Hatteras in abundance in seven to forty-eight 

 fathoms, United States Fish Commission. 



