74 GEOLOGICAL MEMOIRS. 



ring in the eye. It is such characters that form the foundation of 

 my scheme for classifying the Pterodactyli. 



Pterodactyli. 



Saurians with the httle finger converted into a wing-finger by the 

 remarkable prolongation of its phalanges. Peculiar to the Oolite or 

 Jura formation of the European continent and of England. 



A. Dim'thri. Wing-finger with two phalanges (Ornithopterus, 

 bird-finger) . 



Pterodactylus (Ornithopterus) Lavateri, Myr. — Solenhofen. 



B. Tetrarthri. Wing-finger with four phalanges. 



1. Dentirostres. The jaw toothed to its anterior extremity; 

 with an osseous ring in the eye, which is either simple or 

 composed of a series of plates or scales ; scapula and cla- 

 vicle not anchylosed with each other ; a short moveable tail 

 (Pterodactylus) . 



Pterodactylus longirostris, Cuv. — Solenhofen. 



brevirostris, Cuv. — Solenhofen. 



crassirostris, Goldf. — Solenhofen. 



Kochi, Wagler. — Kelheim. 



medius, Munst. — Solenhofen. 



Meyeri, Milnst. — Kelheim. 



Ob Dentirostresi 



Pterodactylus dubius, Milnst. — Solenhofen. 



grandis, Cuv. — Solenhofen. 



longipes, Mmist. — Solenhofen. 



secundarius, Mt/i-. — Solenhofen. 



Spix. — Solenhofen. 



Bucklandi, Myr. — Stonesfield, Tilgate, Solothum. 



2. SuBULiROSTRES. The anterior extremity of the jaw, with 



an edentulous prolongation to which a horny bill was attached ; 



probably no osseous ring in the eye ; scapula and clavicle 



anchylosed; a long stiff tail (Rhamphorhynchus, bill-nosed). 



Pterodactylus (Rhamphorhjaichus) macronyx, Buckl. — 



Lias in England and Franconia. 



Munsteri, Myr. — Solenhofen. 



longicaudus, Milnst. — Solenhofen. 



Gemmingi, Myr. — Solenhofen. 



[J-N.] . 



Notes on the Geology o/Asia Minor. By Peter von 



TCHIHATCHEFF. 



[From a Letter in Leonhard und Bronn's Neues Jahrbuch. Dritter Heft, 1847.] 



Constantinople, 16th Feb. 1847. 

 I HAVE begun a new and dangerous undertaking, which has already 

 engaged me for seven months. The object of my journey to the 

 East is to complete a geological picture of Asia Minor and the neigh- 



