54 Bulletin 15 364 



Prof. Harris at an elevation of about 43 feet. The presence 

 of these land shells recalls the mixed fauna of the Tampa and 

 Ocala beds, and, as there, presumabl}' indicates an increase of 

 neighboring land areas. 



A number of fossils were obtained, chiefly from the Echino- 

 derm, Cerithium, Lithodomiis and Peflen beds, but nearly all in 

 the form of casts. Among these are Conus cf. planiceps, Cerithium, 

 Anip2dlina cf. amphora, Osh'ea, Loripes, PeRen (2 species), Modi- 

 olus, Lithodomus, Hemicardia , GastrochcBua, Divaricella and Echin- 

 oderms. It is of interest to compare this se(5lion with one taken 

 in the near vicinity by Dr. Dair-^ in 1895. I^^ ^^e latter sedlion 

 the fossiliferous zone was limited to four feet; while in the former, 

 fossils were found at intervals through a depth of fifty-seven feet, 

 the principal fossiliferous layers being the PeHen, Spharella, 

 Cerithium, Helix and Echinoderm beds. 



SeHioii at Aspalaga Bluff {see page 55). A land leveled 

 se(5lion was taken several miles south of Old Chattahoochee Land- 

 ing, at the northern end of Aspalaga Bluff. At this point the 

 total height above water level was found to be 155 feet.f Three 

 principal fossiliferous zones were noted, the Madrepora bed, 26 

 feet from the base; a bed of whitish-3^ellow limestone at an altitude 

 of about 32 feet, resting on the coralline bed and containing a 

 quantity of small fossils; and a layer with casts at an altitude of 

 62 feet. 



Above 84 feet the bluff is almost wholly covered. Limestone 

 with PeBen and Placuna, at an altitude of about 145 feet was, 

 noted i7i situ by Prof. Harris. This indicates that the limestone 

 mentioned by Dr. Foerste as occurring 130 feet above water level 

 was also in place, and not transferred as Dr. Dall suggests.^ 



No real discrimination could be made, at least in the region of 

 sedtioning, between the so-called "Aspalaga clays' ' of Mr. Johnson|| 



*Dall and Stanleo-Brown, Bull. Geol. Soc. Amer., vol. 5, 1895, p. 152. 



t The intervals from 10 to 20 and from 43 to 50 feet were covered with 

 talus in the dire6l line of sedlioning. The beds thus concealed were observed 

 at one side of the line and are indicated in the sedlion within the talus slopes. 



%Bull. Geol. Soc. Ainer., vol. 5, 1895, p. 154. 



II Ibid., vol. 3, 1892, p. 129. 



