496 



PROCEEDINGS OF THE \ \'ll<>\ \l, MUSEl I/. 



vol. 38. 



Measurements of lumbar vertebra of Leidyosuchus sternbergii. 



Third. 



Greatesl length of centra 



Greatest i runs verse diameter, anterior end 



I vertical diameter, anterior end 



diameter, poi terior cii« i 



si vertical diameter, posterior end 



test antero-posterior extent ol transverse 



Greatesl length ofrighl transverse process from median line. 

 i width (antero-posteriorly) spinous process near top. 

 Greatesl width between outer edges of prezygapophyse 



in in . 

 30 



20.5 

 1 8. ■". 

 20 

 16.5 

 13 



Fourth. 



in in . 

 30 

 21 

 18 

 20 

 17 

 9. 

 37 

 20 

 35 



The concave, convex, articulating ends of the second sacral are 

 much less pronounced than in the presacrals described above. The 

 inferior surface is broad and only slightly rounded: the sacral ribs 

 are heavy and [irmly ankylosed with the whole side of the centrum 

 and half way up <»n the neural arch. In size and general shape it 

 agrees in all essentials with the sacra] figured by Lainbe," except 

 in this species the neural canal is circular instead of being elongated 

 vertically as in Leidyosuchus canadensis. (See 1>, lig. 1.) 



Measurements of second sacral vertebra of Leidyosuchus sternbergii. 



mm. 



Greatesl length of centrum 27. 5 



Greatesl t ransverse diameter, anterior end L6 



< rreatest transverse diameter, posterior end 17 



Greatesl transverse diameter from middle of cent rum to end of sacral rib 11 



Greatesl width between outer edges of postzygapophyses 23 



Limb and foot bones. — The few bones of the limbs found with the 

 type skull show that the proportional lengths of the fore and hind 

 limbs in Leidyosuchus are approximately the same as in modern 

 crocodiles, although the humeri, when compared with those of a 

 specimen <>f Crocodilus americanus of the same size, are relatively 

 more slender. 



The general characteristics of these bones are well shown in fig. l' 

 and their principal dimensions are L r iven in the table of measure- 

 ment - below. 



Measurement of limb and foot bones of Leidyosuchus sternbergii. 



m m ■ 



■ length id' right humerus 164 



itesl width of proximal end of humerus 3 I 



Greatesl length of fibula ' W 



Greatesl width of proximal end of fibula 27 



Greatesl width id' distal end of fibula 25 



Greatesl length of metatarsal s ' 



Greatesl width of proximal end of metatarsal 20 



Greatesl width of distal end of metatarsal 10 



a So,. Trans Royal Soc. of Canada, vol. I . art . Hi. pi. 1, fig. L3, L908. 



