LIASSIC FORMATIONS. 



81 



The present specimen, from Dr. Haberlein's collection, now in the British Museum, 

 shows the fifth or 'wing-toe' of the foot, ib. fig. 5, v, which had not been preserved in pre- 

 viously described specimens of the genus.^ At least thirty-four vertebrae extend beyond 

 the sacrum ; thirty-eight caudals are the reckoned by Von Meyer in the specimen of his 

 R. Gemminp with the best preserved tail ;^ but this difference would not have yielded 

 sufficient ground for specific distinction. There are, however, differences in the length 

 of the parts of the hind limb which indicate this to have been longer in proportion to the 

 tail and the ' symphysis mandibulse' than in B. Gemmingi. 



Length of femur 

 „ tibia . 

 „ 1st toe 

 2nd toe 

 3rd toe 

 „ 4th toe 

 5th toe 



R. Meyeri. 

 in. 1. 



1 21 



2 

 1 6 

 1 9 



1 Hi 



1 lOi 

 9 



R. Gemmingi (pi. ix, V. 



in. 1. 



M., op cit.). 



In both specimens the number of phalanges of the toes increases from the first or 

 innermost to the fourth, in the usual saurian ratio, .2, 3, 4, 5. In Bampliorlnjnckus 

 Meyeri the fifth toe consists, as in Dimorphodon, of two phalanges, the first being six lines 

 in length, the second three lines, and ending in a point. The metatarsal of this 'wing-toe' 

 is short, broad, and flattened, with a convex outer border at its basal half. 



The bones of the left hind hmb are well preserved in the specimen figured. 



The caudal vertebrae are surrounded by the bone-tendons. Their proportions, as 

 shown in the figure, accord with those in Dimorphodon, PI. XIX, fig. 4.^ The posterior 

 dorsal vertebrae of Bamjjhorhpichiis Meyeri show the broad diapophyses supporting the 

 ribs, which are more slender than those at the fore part of the chest. The symphysis 

 mandibulae is one inch six lines in length, including the edentulous pointed end. Four 

 pairs of long slender laniary teeth are preserved at the fore half of the symphysis. The 

 teeth at that part of the lower jaw in BamphorhyncJms Gemminyi are fewer in number 

 and less closely arranged.* 



* " Ein Stummel wur nicht mit Sicherheit zu erniitteln." — Von Meyer, op. cit., p. 72. 

 2 Op. cit., p. G9. 



* This figure has the neural surface downward in the Plate. 



* Compare with Von Meytr, op. cit., pi. ix, fig. 1, and pi. x, fig. 1. 



11 



