80 



W. C. Knight — Notes on the Genus Baptaiiodon. 



of the anterior lialf into a large elliptical facet with a rugose 

 surface. A facet measured 81 by 123"'"^. These facets unite 

 on the median symphysis, which must have made the girdle 

 very ridged during life. There was no evidence of an inter- 



3 



Figure 3. a. — Pectoral girdle incomplete, about i natural size ; b. 

 - of the interior margin of coracoid, about i natural size. 



-Outline 



clavicle, and the peculiar union of the coracoids precludes an 

 interclavicle of the regular Ichthyosaurian type. In conse- 

 quence the interclavicle in Baptanodon must be' considered 

 rudimentary or wanting. The scapulge are rather heavy bones, 

 with broad notched proximal ends, that fit the projection of 

 the coracoids between the anterior notch and the glenoid cav- 

 ity. Clavicles are unknown to me. 



