TRANSACTIONS OF WAGNER 



TKRTIARY FAUNA OF FLORIDA 



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

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

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

 used in this sense. The form called by Hellprin florutana corresponds to the 

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

 typical generosa. 



Panopea dubia H. C. Lea (1845), probably a Spltenia, is not a Panopca, 

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

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

 found under Panomya. P. bitrnncata Conrad (Proc. Acad. Nat. Sci. Phila. for 

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

 is known as recent from North Carolina to Tampa, Florida. The Plioladomya 

 abrupta Conrad (Fos. Tcrt. Form, p. 26, 1832) was wrongly referred to 

 I'anopea by Deshayes and others; it appears to be allied to Plioladomya, is a 

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

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

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

 Panopea inargaritacea Deshayes, from the Parisian Eocene. 







Genus PANOMYA Gray. 

 I\inomv<i Gray, V\*. MH- An., v., p. 29, 1857; II. and A. Ads., Gen. Kcc. Moll., ii., 



p. 659, 1858. Type l\int>pca (.I/iv) iii>n>,-^ii-ti Spengler. 

 Clu-iwpea C. Mayer, Tert. Moll. Mus. Zurich, iv., 1885. 

 Panopca and Saxicava of authors. 



Shell solid, large, irregular, with 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 burrowcr in mud and 

 gravel, never perforating stones. Type 



Panomya norvegica Spengler. 



.l/iw in-i'cxi(ii Sp.nl., Ada Soc. Hist. Nat. Ilafn., Hi., p. 46, pi. 2, TIL;. 18, 1793. 

 Clyciinci-h turtica Lam., An. s. Vert., vi., p. 458, 1819 ; Gould, 1m- . Mass., p. 37, lii;. 27, 



1841. 

 l\uwpi,-tt .S/V//;V(V7' Val., Arch, du .Mus. Paris, i, p. 15, pi. 3, fii;. 3, 1838; Chcmn., 111. 



Conch., pi. 4. I'IL;. 4. 

 r,uii<p,,-ti llhviui- I'hilippi, Moll. Sicil., i., p. 8, pi. 2, tiy. i, 1836; Smith, \Vern. Soc. 



Mem., \iii., p. 107, pi. 2, tig. 4. 



