Mesozoic and Cenozoic Geology and Paleontology. 21 
Above the bowlder clay, there occurs a dark gray, soft, sandy clay, 
containing numerous bowlders, and above this several feet of stratified 
sandy clay without bowlders ; while on the sides of the ridges, and at 
some places near the present shore, there are beds and terraces of sand 
and gravel constituting old shingle beaches, apparently much more re- 
cent than the other deposits. All of the deposits are more or less 
fossiliferous. The surface of the rocks beneath the bowlder clay, is 
polished and striated in the direction of northeast and southwest, or 
that of the St. Lawrence valley. 
W. M. Gabb* described, from the Post-pliocene of San Pedro and 
Santa Barbara, Turcica coffea, and Calliostoma tricolor, 
Dr. Joseph Leidy+ described, from the Miocene of White river, 
Nebraska, Ahinoceros occidentalis ; from Texas, &. meridianus ; from 
Calaveras county, California, R. hesperius. And from the Pliocene of 
California, Hqwus occidentalis. 
R. P. Whitfieldt described, from the Eocene of the Southern States, 
Pisania claibornensis, Pyrula juvenis, Fulgur triserialis, Fusus tortilis, 
Pseudoliva elliptica, Monoptygma leat, Coluinbella turricula, Pleuro- 
toma capax, P. nasutum, P. persa, P. adeona, Voluta newcombana, 
Mitra haleana, M. biconica, Natica erecta, now Lacunaria erecta, 
N. perspecta, N. reversu, N. onusta, N. alabamensis, now Lacunaria- 
alabamensis, N. aperta, Velutina expansa, Cerithium vinctum, Po- 
tamides alabamensis, Turritella eurynome, T. multilra, T. alabamen- 
sis, Cucullea macrodonta, Crassatella tumidula. 
T. A. Conrad§ described, from the Jackson Group, at Enterprise, 
Mississippi, Corbula jfilosa, Dione securiformis, D. annexa, Tellina 
eburneopsis, T. albaria, T. linifera, Alveinus minutus, Spherella bulla, 
Cyclas curta, Protocardia lima, Gouldia pygmea, Axinewu in- 
equistriata, A. duplistriata, Nuculana linifera, Nucula spheniopsis, 
Arcoperna filosa, Pecten scintellatus, now Camptonectes scintellatus, 
Doliopsis quinquecosta, now Galeodia quinquecosta, Turritella 
perdita, Mesalia arenicola. 
From divers places in Alabama, Mississippi and Texas, Strepsidura 
lintea, Surcula gabbi, S. lintea, Cochlespira engonata, Moniliopsis 
elaborata, Drillia texana, Tortoliva texana, Monoptygma curta, 
Volutilithes indenta, V.impressa, Obeliscus perexilis, Architectonica 
* Pro. Cal. Acad. Sci. 
+ Pro. Acad. Nat. Sci. 
t Am. Jour. Conch., vol. i. 
§ Am. Jour. Conch., vol.i. . 
