482 Young of the Common Lobster. 



following in relation to a notice given in I. 378., deduced 

 from the Bibliotheque Universelle, of certain experiments on 

 vegetation, which Professor Dobereiner of Jena had made, 

 and which had led the professor to feel " disposed to believe 

 that the diminution in the size of plants, as they rise into 

 higher regions on mountains, depends more on the diminution 

 of [atmospheric] pressure than of heat." 



" The diminution in the size of plants, as they rise into 

 higher regions in the mountains, I should rather attribute to 

 the great power of the winds in the higher atmosphere, and 

 to the thinness of the soil, which is so constantly washed 

 away by the sheets of water which descend in elevated lands. 

 As you advance upwards, the trees become gradually stunted, 

 till, at last, nothing but brushwood and ferns occupy the 



Loftiest and least shelter'd rocks, 



Rooted in barrenness, where naught below 

 Of soil supports them 'gainst the alpine shocks 

 Of eddying storms.' 



" It is curious in these islands to see the trees on any wind- 

 ward station bent by the winds in their growth, and assuming 

 and retaining this declining attitude. The spectator in the 

 vale below, or on the sea, w r ould suppose they were under 

 the overbearing influence of some furious blast, which did not 

 reach him. [See Mr. Clarke above, in p. 479., note *.] 



" The water here [see I. 378.] said to be transpired by 

 the trees is doubtless derived from the incredible dews of 

 night, or the mist and clouds which roll round mountainous 

 summits, and become entangled in the trees of the forest. 

 I have often, when the lower lands have enjoyed the finest 

 sunshine, been enveloped at noon-day, in mountainous damp 

 woods, with so thick a darkness, that I could no longer select 

 the mosses and other objects of which I was in search." — 

 [Lansdown Guikling. St, Vincent, May 1, 1830.] 



ap 



Art. II. Description of the Young of the Common Lobster, tvith 

 Observations relative to the Questions of the Occurrence and 

 N mi- Occurrence of Transformations in Crustaceous Animals. 

 By T. Brightwell, Esq. F.L.S. 



" Malacostraca nascunt parentibus omnino fere similia ; Entomostraca 

 vero mutabilia, aetate, exuviis pluribus depositis, formam uitimam et dura- 

 bilem induentia." — Latreille, Gen. Crust, et Ins., i. 6. 



In the beginning of July last (1835), I procured about 

 two ounces of the eggs of the common lobster ; taken by some 



