mereiam.] Trhmic Ichthyopterygia. !):•{ 



ARCHES. 



Coraeoid ( "!) 



Greatest diameter of fragment 66 



Thickness of unbroken end 18 



Ilium 



Greatest length 44 



Width of distal end 20 



Thickness of distal end 9 



Greatest diameter of proximal end '24 



Ischium 



Greatest length 53 



Greatest width 44 



Width of proximal end 33 



Thickness of proximal end 27 



Thickness of distal end 9 



Pubis 



Greatest length 48 



Greatest width 52 



Width of proximal end 26 



Thickness of proximal end 12.5 



Thickness of distal end 7 



LIMB BONES. 



Femur 



Length 55 



Width of proximal end 44 



Width of middle of shaft 29 



Width of distal end 52 



Thickness through distal end at tibial articulation ... 22 



Thickness through proximal end 24 



Tibia 



Length : 36 



Width of proximal end 36.5 



Width of middle shaft 27 



Thickness of distal end 12(f) 



Fibula 



Length 35 



Width of proximal end 22 



Width of middle of shaft 20 



Width of distal end 32.5 



Shastasaurus osmonti n. sp. 



Pls. 8, 9, 10 and 11. 



The type material of this species includes thirty-five vertebra? 

 with the most important parts of the anterior arch and limbs. 

 It was discovered by Mr. V. C. Osmont in the limestones near 

 the Cove in June, 1901. About half of the bones, including the 

 right limb, were embedded in several loose slabs lying at the foot 



