482 Analytical JVotices 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 vertebrce; 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 ihe 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 Soemmering and Cuvier) no vestige is apparent." 

 The authour admits therefore three very distinct species, Fter. longi- 

 rostris, Pter. brevirostris, Pter. medius ; and regards the Pter. grandis, 

 Cuv,, first made known by Soemmering 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, so rich 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 



