36 



Mr. Muicluson on the Bituminous Schist and 



young specimen of this animal, which was intermediate in the 

 relative size of the wing between the foetal and the perfect 

 state of the animal. — The following Table exhibits the measure 

 of the same parts of the specimen in the three stages of growth; 

 but as tiie measurements were taken at three very different 

 times and places, they do not all exactly correspond. The 

 measurements are in inches and parts : 



Pterapus pselaphon. 



Length of body and head 



Antebrachium 



Index finger 



Middle finger 



Ring finger 



Little finger 



Thumb 



Thumb-claw 



Thighs 



legs 



Hind feet 



Expanse of the wings 



VL On the Bituminous Schist and Fossil Fish of Seefeld, in 

 the Tyrol. By Roderick Lmpey Murchison, Esq. F.lt.S. 

 Sec. G.S. F.L.S. Si-c. 8>c.* 

 ''I "'HE village of Seefeld is situated at the summit level of 

 •*- the principal road from Inspruck to Munich, where it 

 traverses one of the most northern ridges of the Rhetian Alps. 

 This range of mountains is chiefly composed of dolomite ; but 

 the middle and lower members of it, about 2 J miles N.N.W. 

 of Seefeld, consist of a bituminous schist or slate containing 

 impressions offish, which is quan*ied, not for building or roof- 

 ing purposes, but solely for the extraction of bitumen. — The 

 chief object of the present communication is to show that this 

 schist does not belong either to the age of a tertiary deposit, 

 or to that of the lias, to each of which epochs it has been re- 

 ferred by different authoritiesf. The inferior strata are much 

 obscured by herbage and pine forests; but in ascending the 

 western and northern flanks of the mountain, the out-crop of 

 the schist is observable in ravines, and also in old quarries 



• Read before the Geological Society, April 3, 1S~9; and communicated 

 by the Author. 



f See Ellin. Phil. Journal, vol. xiii. p. ill; and Annals orPhilos.,Junc 

 Ib'Jl, p. 156. 

 / near 



