TRANSACTIONS OF WAGNER 

 1468 



TERTIARY FAUNA OF FLORIDA 



meris, but the arrangement of the teeth differs somewhat. The American 

 fossil was referred to Micromeris by Conrad, but its hinge agrees exactly with 

 that of Medley's type -in all essentials. 



Subgenus Crassinella Guppy, 1875 (not of Bayle, 1879). Types Gouldia 



pacifica C. B. Adams, and Crassatella martinicensis Orbigny. 

 Shell minute, subtriangular, much compressed ; the umbones acute, sub- 

 central ; hinge with two cardinals in each valve, the lateral laminae developed, 

 the posterior left lateral lamellose behind the ligament ; ligament and resilium 

 internal ; inner margins of the valves smooth. Formula L - 



R. i.oiroioi.o 



Gouldia (sp.) C. B. Adams, 1847 ( not f Bonaparte, 1850) ; Eriphyla Dall, 

 1879 (not of Gabb, 1869), and Pseuderiphyla Fischer, 1887, are synonymous. 



Genus Eriphyla Gabb, 1864. Type E. umbonata Gabb. Chico Cretaceous of 

 California. 



Shell like Crassinella but with the ligament and resilium chiefly external. 



This genus bears nearly the same relation to Crassinella that Remondia 

 does to Crassatellites. Eriphylopsis Meek, 1876, is synonymous. This group 

 so far as known is confined to the Cretaceous. 



Anthony a Gabb, 1864, is probably nearly related to Remondia, but is de- 

 scribed as having only two cardinal teeth in each valve. I have not been able 

 to compare specimens. It may bear to Remondia such a relation as Scambula 

 bears to the typical Crassatellites. 



Genus CRASSATELUTES Kriiger. 

 Crassatellites Kriiger, Arch, neuest Entd. Urwelt, ii., p. 466, 1823. Type C. sinuatus 



Kriiger, = Crassatella gibbosula Lamarck, Ann. du Museum, vi., p. 410 (fide Bronn, 



Index Paleont, i., p. 344, 1848). Eocene. 

 <^Crassatella Lamarck, Syst. An. s. Vert., p. 119, 1801 (not of Lamarck, Prodrome, p. 



85, I799- Type Mactra cygnea Chemnitz). 

 ~^>Pachyth(zrus Conrad, Am. Journ. Conch., v., p. 47, 1869; Proc. Acad. Nat. Sci. Phila. 



for 1872, p. 50. Type Crassatella vindinnensis Orbigny, Pal. Franc.., Terr. Cret, iii., 



p. 78, pi. cclxvi., figs. 1-3. Cretaceous. 

 ^.Scambula Conrad, op. cit., p. 48, 1869; p. 51, 1872. Type .S. perplana Conrad, Am. 



Journ. Conch., v., p. 48, pi. ix., figs. 7-8, 1869. Upper Cretaceous. 

 >Crassitina Weinkauff, Marl. Chemn. Conch. Cab. Neue ausg., Crassatella, p. i, 1881. 



Type C. contraria Gmelin. 



Lamarck's original type for Crassatella was a typical Mactra, the type 

 specimens of which, from the Chemnitz collection, are still preserved at Copen- 

 hagen. The next name in point of date is that of Kriiger. 



