Geology and Natural Htstory. 



■es, but it has only a depression there. I 

 jaw wdlh two teeth on each side and two st 

 Tom the lower jaw. This, although found ( 



) like the recent ones that tliey might 

 p;i>? tor the same". The same colossal Pectens abound as in Vir 

 -iiiia, only the P. JIadisonms so abundant in Virginia aiid Mary 

 1:111,1 is replaced by R Jefersonius and F. septenarms, five or six 

 indies in width. . 



At Col. Yello why's marl pit where digging is now m progress, 1 

 t'ouml the Miocene about three or four feet in thickness, restuig on 

 lilack Cretaceous sand with black gravel, and containing character- 

 istic Mipley group fossils. It is here that a profusion of Belom- 

 nitus is thrown up by the laborers, over the Miocene marl heap, and 

 irive rise to the opinion that they occur in the Miocene marl. 



At Snow Hill, twenty-two miles from here in Green county, the 

 Ripley Group is finely developed, containing closely packed speci- 

 mens of the Ripley species in perfect preservation. 



3. On the Earti^iLle at Oahu, Huwaian Islands, on FeK 18; 

 by Professor W. D. Amxaxder. (From a letter to J. D. Dana, 

 dated Oahu College, Feb. 28, 1871.)— I herewith send you some 

 copies of our island papers containing accounts of a severe earth- 

 quake, which was experienced here on the 19th of this month It 

 was the severest earthquake ever experienced on the island ol Uahu 

 ^nthin the memory of man. In fact it was quite as severe here as 

 on Hawaii, and seems to have been felt most severely at /^^hauia. 

 As I am not quite satisfied with the accounts of it pubhshed here, 

 A will add a few fiicts that I have collected. 



In regard to the time Flitner's astronomical clock stopped at 

 10" IP" 17s ^ Honolulu mean time, allowing for the en'or ot 

 the clock. In regard to the duration of the shock, Ke^. ix. 

 WilUamson, Dr. J. Hutchinson, Judge Hartwell and one or t^^o 

 T'thers who timed it carefully, agree within a fr^\^^^^«^?l '" j'd 

 ing It 55 seconds. The general opinion here is that it . > 

 ^bout a minute, and the same was the case at Lahama and 1 a 



In regard to the direction of the shock, the motion ^a^ tnun) 

 vertical with a rocking movement northeast and southwest It 

 ^as compared by some to the sensation of ndmg a i.-k,n*r 

 "T^: - ^Jri4g a cart over a rough oord-y ^^^^^^ 



^toneand adoW; Sings wer^ badl| -acked, particula^^^^ 

 8<'hool house the laro-e stone church, the Queen's hospital, ana 

 *he com. Ssl and The northeast and south.^st -f^jm^^^ 

 ••^lly most shaken. Stone fences running northwes ami southeast 

 ^ere'thrown dow-n, while those at right angles to this dirtctioa 



