RHINOCHELYS. 177 



produced muzzle, a shorter interval between the latter and the tym- 

 panic ring, and with relatively wider nasals and apparently less 

 prominent palatal ridges. 

 Hab. Europe (England). 



43980. The cranium, imperfect posteriorly, and with the palate 

 {Fig.) obscured by phosphate ; from the Cambridge Greensand. 

 The type (fig. 42) ; figured by the writer in the ' Quart. 

 Journ. Geol. Soc' vol. xlv. pi. viii. figs. 2, 2 a, 2 b. Com- 

 pared with the figure of the type of B. pulchrieeps, this 

 specimen exhibits the specific characters of the more 

 vaulted cranium, the much less prognathous premaxillge, 

 and the shorter interval between the latter and the an- 

 terior border of the tympanic ring, as well as the greater 

 relative width of the nasals. The greater part of the 

 quadrate is preserved, which seems to show that the 

 canal for the stapes was entirely open, and that there 

 was a notch in the tympanic ring ; the latter being partly 

 formed by the quadratojugal. Purchased, 1872. 



R. 1503. Cast of a smaller cranium. The original was obtained 

 from the Cambridge Greensand, and is preserved in the 

 Collection of T. Jesson, Esq., of Northampton ; it is 

 noticed by the writer, loc. cit. The wide nasals are well 

 shown. Made in the Museum, 1889. 



Rhinochelys macrorhina 9 Lydekker 1 . 



Skull more vaulted than in the type species, with a much flattened 

 frontal region, the -prem axillae rather less prominent and somewhat 

 deeper, and the nasals very much larger and longer; nares of 

 medium size. 



Hab. Europe (England). 



35193. The anterior portion of the cranium, with the palate ob- 

 (Fig.) scured by phosphate ; from the Cambridge Greensand. 

 The type ; figured by the writer in the ' Quart. Journ. 

 Geol. Soc' vol. xlv. pi. viii. figs. 7, 7 a. All the bones 

 posterior to the frontals are wanting, but the others are 

 nearly perfect. Purchased, 1859. 



R. 1504. Cast of the corresponding portion of a rather smaller 

 cranium. The original was obtained from the Cambridge 

 Greensand, and is in the collection of T. Jesson, Esq.. of 

 Northampton. Made in the Museum, 



1 Quart. Journ. Geol. Soc. vol. xlv. p. 230 (1889). 

 PART III. K 



