482 Analytical Notices of Books. 
suspected to the Pterodactylus longirostris, formed the type of a new 
species. After describing the peculiar characters of the calcareous schist 
in which they are found, the authour proceeds to examine in detail the 
characteristics of each of the remaining bones of the skeleton, as far as 
he was able to examine them, and institutes a comparison, (the result 
of which is given in a tabular form,) between their measurements, and 
those of the bones of Pter. longirostris. From the latter the new 
species, which is the Pter. medius, Munst., differs more especially 
in the following characters: ‘1, the much greater breadth of the 
lower jaw in proportion to its length; 2, the sudden narrowing 
of the lower jaw at its anterior extremity, while in Pter. longirostris it 
becomes broader; 3, the greater length and strength of the teeth, in 
comparison with the lower jaw; 4, the much shorter neck, and the 
very different shape of the cervical vertebre; 5, the greater length of 
the vertebral column, in comparison with the nearly equal length of the 
lower jaw; 6, the greater breadth and strength of the four or five first 
ribs in comparison with those which succeed them ; 7, the smaller tail ; 
8, the extraordinary size of the sternum; 9, the comparatively greater 
length of the tibia as regards the femur; 10, the very different pro- 
portion of almost all the joints with regard to the lower jaw; 11, the 
existence of the fibula and the radius, of which in the other two 
species (according to Scemmering and Cuvier) no vestige is apparent.” 
The authour admits therefore three very distinct species, Pter. longi- 
rostris, Pter. brevirostris, Pter. medius; and regards the Pter. grandis, 
Cuv., first made known by Scemmering in the Transactions of the 
Munich Academy, and the other bones of a Pterodactylus described by 
Spix in the same collection, as not specifically distinct from the first 
named, from which they only differ in size, a circumstance probably 
dependent on the respective ages of the different individuals. All these 
species are found in the calcareous slate of Solenhofen, Eichstadt, 
Kelheim, and Monheim, sorich in remarkable organic remains as to 
have already furnished the authour with no fewer than sixteen fossil 
species. 
Dr. Goldfuss’s ‘* Beitrage zur kenttniss verschiedener Reptilien der 
