Geological Society. 311 



cell. These views he now confirms ; and in the present paper shows 

 that they admit of being extended to the corpuscles of the blood. 



He then compares appearances observed in the latter with those 

 he had traced in the ovum. These relate to the number of parts of 

 which the nucleus is at diiferent periods composed, — the nature of 

 the nucleolus, — the communication between the nucleolus and the 

 exterior of the cell, — the formation of the contents of the cell out of 

 the nucleus, — the final division of the nucleus into the foundations 

 of a limited number of young cells, destined to succeed the parent 

 cell, — and the escape of the young cells for this purpose. It follows 

 from these investigations, that the corpuscles of the blood are gene- 

 rated by a process essentially the same as that giving origin to those 

 cells which are the immediate successors of the germinal vesicle, or 

 original parent cell ; it being also by a continuation of the same 

 process that the corpuscle of the blood divides itself into the minuter 

 objects figured by the author in his former paper on the blood. 



He adds, that in its form and internal state, the blood-corpuscle 

 found in the adult of certain animals, very much resembles that ex- 

 isting only in the foetal life of others. It is incidentally remarked, 

 that the foetal brain, at certain periods, appears to consist almost 

 entirely of objects very much resembling those which, in some stages, 

 form the nuclei in the foetal corpuscles of the blood. 



The author concludes, by expressing his opinion, that the mode 

 of evolution of the minute mammiferous ovum is deserving of close 

 attention, in connexion with some of the processes by which nourish- 

 ment is communicated, and the growth of the body eflPected, at all 

 future periods of life. 



January 21. — A paper was in part read, entitled, " On the action 

 of certain Inorganic Compounds, when introduced directly into the 

 Blood." ByJ.Blake,Esq., M.R.C.S. Communicated by P. M. Roget, 

 M.D., Sec. R.S. 



GEOLOGICAL SOCIETY. 

 [Continued from vol. xvii. p. 542.] 



April 29, 1840.— A paper was first read, " On a few detached 

 places along the coast of Ionia and Caria ; and on the island of 

 Rhodes ;" by William John Hamilton, Esq., Sec. G.S. 



The localities described in this paper are, 1. Fouges (anc.Phocaea); 

 2. Ritri (anc. Erythr^e) ; 3. Sighajik (anc. Teos) ; 4. Scalanuora, 

 near Ephesus ; 5. Boodroom- (anc. Halicarnassus); 6. Cnidus; ?• 

 Island and shores of the Gulf of Syme ; and 8. Rhodes. 



1. Fouges is situated in a small bay at the northern extremity of 

 the Gulf of Smyrna, and all the formations in its neighbourhood ex- 

 amined by Mr. Hamilton are volcanic. On the north side of the 

 bay, a range of hills, from 300 to 400 feet high, extends several miles 

 to the eastward, and consists in the uppermost part, of beds of smooth 

 semivitrified red and gray trachyte, containing numerous cavities 

 lined with mammillated chalcedony. The trachyte passes down- 

 wards into a soft, white, pumiceous sandy rock. The greater part 

 of the hills to tlie north of the bay are composed of the same for- 

 mation, traversed, in several places by north and east, narrow trap- 



