TRANSACTIONS OF WAGNER 



TERTIARY FAUNA OF FLORIDA 



SO far as yet described, and its mutations are analogous to those observed in 

 P. gcnerosa and other species of which a large series has been studied. If a 

 varietal name be thought advisable for the arcuate form, naviciila might be 

 used in this sense. The form called by HeWprin J^orida/ia corresponds to the 

 variety solida of P. generosa, and the form he referred to Mciiardi to the 

 typical gencrosa. 



Panopca diibia H. C. Lea (1845), probably a SpJiciiia, is not a Panopea, 

 as it has a chondrophore like Mya. It is from the Miocene of Petersburg, 

 Virginia. The various synonymes of the so-called Panopca norvegica will be 

 found under Panoinya. P. bitntncata Conrad (Proc. Acad. Nat. Sci. Phila. for 

 1872, p. 216, pi. 7, fig. 1) has not yet been found in a definitely fossil state, but 

 is known as recent from North Carolina to Tampa, P'lorida. The Pholadomya 

 abnipta Conrad (Fos. Tert. Form, p. 26, 1832) was wrongly referred to 

 Panopea by Deshayes and others; it appears to be allied to Pholadouiya, is a 

 pearly shell and the type of the genus Margaritaria Conrad (Mio. Checkl, 

 1863, + Actinoinya C. Mayer, Mus. Zurich, 1870), and which may perhaps 

 include subgenerically Argyromya Fischer (Man., 1887), founded on the 

 Panopca uiargariiacca Deshayes, from the Parisian Eocene. 



Genus PANOMYA Gray. 

 Panoinya Gray, Figs. Moll. An,, v., p. 29, 1857; H. and A. Ads., Gen. Rec. Moll., ii., 



p. 659, 1858. Type Panopca (^Uja) iiorvci^ica Spengler. 

 Chenopca C. Mayer, Tert. Moll. Mus. Zurich, iv., 18S5. 

 Panopea and Saxicaz/a of authors. 



Shell solid, large, irregular, witli a single cardinal tooth under the beak 

 in each valve; the pallial line of unconnected rounded impressions; the animal 

 larger than the shell, with large, united siphons, diverging slightly at the tips 

 and covered with a wrinkled coriaceous epidermis ; a burrower in mud and 

 gravel, never perforating stones. Type 



Panoinya norvegica Spengler. 

 Mya norvegica Spgl., Acta Soc. Hist. Nat. Hafn., iii., p. 46, pi. 2, fig. 18, 1793. 

 Glyciineris arctica Lam., An. s. Vert., vi., p. 458, 1819 ; Gould, Inv. Mass., p. 37, fig. 27, 



1841. 

 Paiiopcra Spengleri VsX., Arch, du Mus. Paris, i, p. 15, pi. 5, fig. 3, 1838; Chemn., 111. 



Conch., pi. 4, fig. 4. 

 Panopaa Bivonce Philippi, Moll. Sicil., i., p. 8, pi. 2, fig. i, 1836; Smith, Wern. Soc. 



Mem., viii., p. 107, pi. 2, fig. 4. 



