Nova Acta Academia Nature Curiosorum. 483 
“* Vorwelt”” are collected under two heads, according to the strata in 
which the various fossil reptiles of which they treat have been discovered. 
The first head comprises the reptiles of the lithographic schist, and 
opens with a review of the history of the genus treated of in the 
preceding paper, to which it adds another species, the Pterodactylus cras- 
sirostris, Goldf., noticing at the same time the Pter. macronyz, Buckl., 
from the blue lias of Lyme, which was apparently unknown to Count 
Munster. The new species is from the lithographic stone of Solenhofen, 
and is established on a nearly perfect skeleton, wanting little else besides 
the hinder extremities and the contiguous parts of the pelvis. A very 
careful and detailed description is given of its several bones, which are 
compared with those of the other species of the genus, and the analogies 
of the more doubtful among them with the bones of other animals, 
discussed and ascertained. The description concludes with a tabular 
view of the dimensions of the several parts in the four German species, 
the result of which is stated to be that their greatest variation occurs in 
he relative length of the skull, of the neck, and of the metacarpus. 
The discrepancies between the different species in these and other less 
important points are then pointed out, and the authour concludes by 
some general remarks on the peculiarities of the skeleton in this extra- 
ordinary genus, and on the indications with regard to its station in nature, 
its habits, and its mode of existence, which are affurded to us by its 
remains. Into this investigation our space will not permit us to enter ; 
but we may observe that the authour seems to consider the animals in 
question as preserving, in all the more essential characters of their 
skeleton, the true reptile type, but deviating, in the less important 
organs, towards that of birds on the one hand, and of bats on the other. 
Their habits he seems inclined to regard as having been very similar to 
those of the bats of modern days, and hints at the large Libellule tound 
in the same lithographic schist, as having formed a part of their means 
of subsistence. He enters particularly into the question of the kind of 
covering with which their bodies were clothed, and from various circum- 
stances, which he details at length, comes to the conclusion that his 
“« Pter. crassirostris was not covered, like reptiles, with scales and shields, 
Vor. V, 112 
