280 



M. E. Baudclot on the Influence of the 



many of the species have hitherto been peculiar to the several 

 strata. This is here shown. 



So far as life-evidence can be trusted, this tabic demonstrates 

 the Hunstanton Rock to be Upper Greensand. With 2 t Green- 

 sand species, and only 5 Chalk forms, and 3 Gault forms, the 

 affinity of the bed with the latter deposits must be very slight, 

 and need not be anything at all. Hence, and especially as most 

 of them come from the middle of the stratum, the species pccit- 

 liar to the Hunstanton Rock must be regarded as species pecu- 

 liar to the Upper Greensand. 



And when it is remembered how many of the fossils of most 

 Greensand localities had previously only been known from the 

 Chalk or Gault, the proportion here is singularly small. Even 

 in this section there are 14 Greensand species which, since they 

 are also Chalk species, may, at one period of our knowledge, 

 have been peculiar to the Chalk ; while there are 3 which, for 

 the same reason, may have appeared to be peculiar to the Gault. 

 Therefore there is nothing in the fossils to distinguish this de- 

 posit from the Upper Greensand of other localities: to the 

 pala3ontologist the Hunstanton Red Rock is a northern extension 

 of the Upper Greensand, 



XXXIV. — On the Influence of the Nervous System on the Re- 

 spii-ation of Insects. By E. Baudelot*. 



The influence of the nervous system upon the respiration of 

 Insects had attracted but little attention on the part of physio- 

 logists until, in 1869, M, Faivre undertook some interesting 

 investigations upon this subjectf. 



The results of his researches led this naturalist to assume that 

 in the Dytici, as in the Mammalia, the respiratory movements 

 have their origin or starting-point in a special region of the 



* Translated by W. S. Dallas, F.L.S., from' the ' Comptes Rendus,' 

 June 20, 1864, p. 1161. 



t Annales des Sciences Naturelles, tome xiii. 



