224 PROCEEDINGS OF THE ACADEMY OF [1893. 



(C)^ White sand 40 ft. 300 ft. 



White sand, fine, with streaks of clay 15 ft. 315 ft. 



White sand, coarse 15 ft. 330 ft. 



White sand, medium coarse 20 ft. 350 ft. 



White gravel, coarse 10 ft. 360 ft. 



White gravel, coarser 10 ft. 370 ft. 



(D) White gravel very coarse, with large 



pebbles and boulders 5 ft. 375 ft. 



The sands and gravels marked A, B, C and D, all furnish water, 

 and may be regarded as water horizons ; that marked A being the 

 one reached by wells dug in this neighborhood and which pene- 

 trate through the black clay. 



Excepting the few feet of surface gravels which are of more 

 recent date, it may be premised that all the beds in the section are 

 below the lower green sand marl bed, since they are west of the out- 

 crops of the same, as mapped by the New Jersey Geological Survey. 

 In the report of the survey for 1868, Professor G. H. Cook describes 

 nest below the lower green sand a series of beds of " clay marls," 

 with an estimated thickness of 277 feet, of which the upper 170 feet, 

 he states, is composed of laminated sands and thin clay seams, and 

 the lower 170 feet of heavy, dark clays and green sands. 



These " clay marls," in turn, rest upon another group of strata, 

 composed largely of white, yellow and red clays, termed plastic 

 clays, and which form the base of the cretaceous as it exists in New 

 Jersey. 



These plastic clays have a thickness, as shown in the report on 

 clays (N. J. Survey, 1868), of 347 feet. The plastic clays can be 

 distinguished from the " clay marls " by the entire absence of green 

 sand grains in them. 



Referring to the section, it may be noticed that beneath the black 

 clays there are 66 1'eet of fine and coarse sand and medium, coarse 

 and heavy gravels, including a parting near the middle six feet 

 thick, largely composed of green sand. The presence of the green 

 sand would seem to class these gravels with the laminated sands and 

 clay marls, rather than with the plastic clays. The division 

 between these two groups therefore occurs at the depth of 130 feet. 

 Allowing five feet for the surface gravels, we have 125 feet as the 

 thickness at this locality of the lower or dark clay and green sand 

 division of the group of laminated sands and " clay marls." The 

 thickness of the overlying gravel is, however, probably greater than 

 five feet upon the more elevated portions of this region, so that a 

 greater depth would have to be gone through in some places to 

 reach the yellow and black clays of the clay marl series. 



Remarks on Hawaiian Crania. — Dr. C. N. Peirce remarked 

 that Dr. I. M. Whitney of Honolulu, S. I., to whom the Academy is 

 indebted for the collection of crania presented this evening, had 

 informed him that the ancient Hawaiians had two quite distinct 



