Clii CORRELATION OF MARYLAND MIOCENE 



Among the Foraminifera nnmmulites are absent, and, in America, 

 Orhitoides. AmpTiistegina, Elirenbergia, Cassidulina, and Ellipsoidina 

 are prominent in Europe; Polystomella, Planorhulina, Rotalia, Texiu- 

 laria, Polymorpliina, and Uvigerina in America. Lithothamnion is a 

 common fossil in the marine Miocene of both continents. 



There are left the Mollusca, which we may examine a little more 

 closely. 



Cephalopods are rare in the Miocene. The Aturia which in America 

 does not persist beyond the middle of the Oligocene, in Europe is said 

 to linger a little longer. Nautilus is known from both the east and west 

 coasts of America in the Miocene. 



In America, among the Toxoglossate gastropods, Terehra (represented 

 by species of the subgenera Hastula and Oxymeris) is notable, there are 

 many Pleurotomoids, the cones are few and coarse, Cancellaria is 

 represented by a notable number of species. The same remarks apply 

 almost equally to the North German Miocene. 



American Ehachiglossa are numerous. A species of Oliva and one of 

 Scaphella at least appear in both America and North Germany. Busycon 

 in the former region is represented by Tudicla in the latter. Fusus is 

 more abundant in Europe than in America but the peculiarly character- 

 istic Miocene subgenus of Chrysodomus, Ecphora, is represented in North 

 Germany by a form almost intermediate between the American E. quadri- 

 costata and Chrysodomus decemcostatus. Ancilla, Murex, Purpura and 

 Tritia are conspicuous in the Miocene faunas of Europe, Ptychosalpinx, 

 Ilyanassa and Tritia in America. The Melanopsis of Europe is paralleled 

 by the BuUiopsis of America. 



Among the Taenioglossa, Turritella is conspicuous in both continents, 

 a form of Cassis (Cassidaria or Sconsia) is equally present. Cyprcea is 

 more numerous in Europe but represented in both regions; Pyrula 

 occurs in both, more abundantly in Europe; as do the various types of 

 Tritoniidw, such as Septa, Lotorium and Ranella. Pyrazus is more 

 abundant in Europe and the Calyptrceidce in America. 



Among the Ehipidoglossa, Calliostoma is more representative in 

 America and Gibhula in Europe. 



Turning to the bivalves we .find an equally noticeable parallelism. 

 In Europe Glycymeris, Barhatia and Scapharca are very characteristic, 



