TRANSACTIONS OF WAGNER 

 IS20 



•^ TERTIARY FAUNA OF FLORIDA 



pit, Waccamaw River, South Carolina, Johnson, and of the Caloosahatchie 

 marl, on the Caloosahatchie River, Florida, Dall. Living from Cape Hatteras, 

 North Carolina, to the Gulf of Mexico in six to eighteen fathoms, sand or mud. 

 This species was long lost sight of, or confounded with the broad, flat New 

 England species which I have named P. Gouldiana. Like the other American 

 species referred to Clidiophora, except P. claviculata, it is not quite typical. The 

 last-mentioned species has long and conspicuous posterior hinge-teeth, while 

 in the others this feature is replaced by relatively quite short and inconspicuous 

 teeth, as in the present case. As the tooth is present, though short, it is perhaps 

 hardly worth while to separate the group from Clidiophora. 



Pandora ( Kennerles^a ) lata n. sp. 

 Plate 57, Figure 18. 



Miocene of Maryland (St. Mary"s County?) collection of the National In- 

 stitute. 



Shell small, left valve very convex, patulous below behind, with a rather 

 broad escutcheon bounded by a strong carina; anterior area short, posterior 

 area very narrow ; rostrum very short and blunt, slightly recurved ; surface 

 concentrically striated ; hinge-teeth short and small ; lunule very deep, com- 

 pressed, so as to appear linear; right valve slightly concave, concentrically 

 striated, with traces of the usual impressed radiating lines. Length 19.0, height 

 10.5, diameter 3.5 mm. 



This species is shorter and thicker than P. arenosa and much less acute. 

 Its exact provenance is not known, as it was received from the old National 

 Institute, but the specimens have the livid purple color characteristic of many 

 of the St. Mary's fossils, and it is possible it was collected in that region. 



Pandora (Kennerleyia) arctica n. sp. 

 Plate 57, Figure 26. 



Leda clays of the St. Lawrence drainage (Dawson) and Pleistocene, prob- 

 ably equivalent clays on the coast of Maine, at Saco (Packard), and of New 

 Brunswick (Matthews). 



Shell small, oval, nearly fiat, with no perceptible rostrum; anterior area 

 and posterior dorsal area rather large, the latter hardly dififerentiated from 

 the middle area of the disk ; sculpture of concentric, somewhat rude, striation, 

 lunule and escutcheon nearly linear ; there are no radial threads near the dorsal 

 margin ; the right valve is flat, with some irregularly radial striae and the usual 

 concentric striation. Length 16.5, height 9.0, diameter 2.5 mm. 



