WILLISTON AND MOODIE : OGMODIRUS MARTINII. 



DESCRIPTIOX OF PL.\TES. 



PLATE I. 



The cervical vertebrae of Ogmodirus mariinii, photographed from the 

 ventral surface. \ natural size. 



PLATE IL 



The left fore paddle of Ogmodirus martinii, photographed from the dorsal 

 surface. The elements are of doubtful association. ;\ natural size. 



PLATE in. 



Fig. 1. The right humerus of Ogmodirus martinii, photographed from 

 the dorsal surface and sho'wing at S the tooth marks of some predaceous 

 fish. \ natural size. 



Fig. 2. The distal end of the humerus, showing the pits and cones, re- 

 sembling miniature volcanoes, the results doubtless of the exit of the Canales 

 ossificantes perforantes carrjnng osteoblasts. \ natural size. 



Fig. 3. A photograph of a broken section through the femur. This 

 section shows, on the right, the canal leading into the calcite-filled cavity. 

 These features are apparently growth characters. 



Fig. 4. A photograph of the proximal end of the humerus to show at A 

 the pits and cones. 



PLATE IV. 



Fig. 1. The left femur of Ogmodirus martinii. \ natural size. 



Fig. 2. Neural spines. 



Fig. 3. The right ilium. 



Fig. 4. A portion of a pubis. 



Fig. 5. Two views of a cer\'ical vertebra. 



PLATE V. 



The vertebrae of the type of Emhaphias circulosus Cope. Specimens in 

 the Academy of Natural Sciences of Philadelphia: 1 and 2, lateral and end 

 views of vertebra; 3 and 4, lateral and end views of other vertebra. 



