68 



THE UNIVERSITY SCIENCE BULLETIN. 



Fig. 3. (1) The coracoids of Leurospondylus. After Brown. 



(2) The pelvic girdle of Leurospondylus. After Brown. 



These figures are inserted here for the sake of completeness. The form 

 described by Brown is very similar to Ogviodirus, and the parts of the skeleton 

 which he figured and described are lacking in the present form. 



The humerus is associated with the paddle remains provision- 

 ally. They were scattered and dissociated when the specimen was 

 brought to the museum. It is possible that portions of two pad- 

 dles are represented. The element is well characterized in the 

 figure (plate III, fig. 1, and text fig. 2). It is short, heavy and 

 thick, extremely so for a plesiosaur. Its lower surface is flattened 

 and relatively smooth, with a slight tuberculation near the proxi- 

 mal end for muscular attachment. The ends are marked with 

 pits and cones (plate III, figs. 2 and 4), resembling minature vol- 

 canoes. These pits and mounds doubtless indicate the fact of 



