Royal Society. 44T 



1st. There is no necessity that there should have been in 

 the French locaHties any synchronic deposits at all during the 

 deposition of the Wealden. On the contrary, there is a ne- 

 cessity that in parts of France, where the Wealden is want- 

 ing, there should be no synchronic marine deposit; for the 

 Wealden was a great freshwater area, which must have been 

 walled in by a more or less extensive track of land, part of 

 which wall must have been in or near the country where the 

 Neocomian is now found. 



'2nd. The argument of the relation of the Wealden to the 

 oolitic series in preference to the cretaceous, inferred from the 

 determinations of Professors Owen and Agassiz respecting the 

 forms of fishes and reptiles of the Wealden — determinations 

 which M. Leymerie, with strange hardihood, denounces as 

 "trop vague et trop incertaine pour qu'on puisse serieuse- 

 ment s'y arreter" — is further borne out by the fact, that 

 Wealden mollusca are found in the freshwater beds, disco- 

 vered by Mr. Robertson among the oolitic strata of Brora*. 



London, April 1845, Edward Forbes. 



LXV. Proceedings of Learned Societies. 



ROYAL SOCIETY. 

 [Continued from p. 256.] 

 Feb. 6, "/^N the Structure and Development of the Blood. — First 

 1845. ^^ Series. The development of the Blood-Corpuscle in 

 Insects and other Invertebrata, and its comparison with that of iMan 

 and the Vertebrata." By George Newpoi-t, Esq., F.R.C.S., President 

 of the Entomological Society, &c. Communicated by P. M. Roget, 

 M.D., Sec. R.S. 



The author commences his paper by remarking, that he was led 

 to the present inquiry by some curious facts relating to the blood of 

 insects, which attracted his notice while engaged on the last paper 

 he presented to the Royal Society, on the reproduction of lost parts 

 in insects and myriapoda. Some of these facts he is desirous of 

 making known at once to the Society, ])reparatory to his offering 

 them more extended researches on the blood of the invertebrata, and 

 its comparison with that of the higher animals. 



The chief purpose of the author in the present paper, is to show 

 the analogy which exists between the different corpuscles in the 

 blood of insects and of the vertebrata, to trace the changes which 

 the former undergo as compared with those of the latter, and to 

 show that in development and function they are analogous to secre- 

 ting cells. 



In pursuance of this object, he premises a brief notice of what 

 little was already known respecting the corpuscle in the articulata, 



* See Geological Proceedings, vol. iv. part 1. p. 174 [or Phil. Mag., S. 3. 

 vol. xxiv. p. 71 j. 



