BONES Of TYPICAL REPTILES ANB OTHER ANIMALS. 155 



robust, depressed, bifid spine ; three front pairs of legs smooth ; 

 coxae of hind legs terminating externally above in an obtuse, nearly 

 perpendicular spinose projection ; femora rugose, much cui'ved, with 

 a strong irregular spine projecting obliquely upwards from the upper 

 surface of the distal extreniitj', a second shorter spine projecting late- 

 rally from the internal surface at end of first third ; also a number of 

 obtuse pectinate denticles projecting from each side, but radiating at the 

 proximal extremity ; tibiae rugose, with three long curved spines and 

 several minute denticles projecting downwards and inwards from in- 

 ferior surface, a space being left between the first two spines and the 

 thii'd ; tarsi simple ; palpi snbcylindrical, nearly smooth, with short 

 slender spines ; cheliceres cylindrical, pilose, the pincers serrated in- 

 ternally ; ventral surface of cephalothorax dull, but smooth ; last two 

 segments of abdomen minutely granulated. 



Length of cephalothorax 85 lines, of entire body, including closed che- 

 liceres, 4 lines ; relative length of legs 1 , 3, 2, 4. 



Chili (Reed), One specimen. B.M. 



Possibly the G. hicornis of Nicolet, but without the double 

 spiue on the oculiferous tubercles, and with a different distribu- 

 tion of spines on the bind legs, so that I suspect it to be distinct ; 

 it is evidently allied to G. modestus of Nicolet. 



Resemblances between the Bones of Typical living Reptiles and 

 the Bones of other animals. By Habet GtOVIEr Seelet, 

 r.L.S., r.G.S., Professor of Physical Geography in Bedford 

 College, London. 



[Read June 18, 1874.] 



PAET I. 



the similitudes of crocodile bones. 



§ 1. The Mammalian Characters of the Crocodile. 



In the palate, Crocodiles are remarkable for the extent to which 

 the posterior nares are carried backward by the closing over 

 tbem of the palatine and pterygoid bones. This condition is 

 paralleled in tbe great toothless ant-eater, Myrmecophaga, where 

 the nares are carried back behind the pterygoid bones so as to 

 make a flat uncleft palate. Nor is the resemblance less close in 

 the fore part of the skull ; for the immense toothless maxillary 



