LIST OF NAMES 975 



Epiotic (Miall) of crocodile. 



Not "epiotic" of fislies (= tabular). See Watson's and Williston's remarks 

 below. 

 Inf radentary ( Watson ) . 



Anterior splenial of Broom. 

 Intertemporal, Williston, Case, Broom, Moodie, Gregory. 



Watson believes a new name necessary, but provisionally uses intertem- 

 poral. 

 Opisthotic (see Paroccipital). 



Paroccipital Owen, a prior term (Williston). 

 Petrosal of mammals. 



Said to arise from four centers; commonly believed to represent fused 

 prootic and opisthotic (or paroccipital). 

 Para sphenoid of authors. 



Probably gave rise to mammalian vomer, as held by Broom ; but practi- 

 cally all authors continue to use parasphenoid unless wishing to empha- 

 size homology with mammalian vomer. 

 Postparietals, Broom, Watson, Moodie. 

 See dermosupraoccipitals (Miall). 

 Preangular, Broom. 



Williston and Gregory are inclined to believe this is homologous with the 

 true splenial of the crocodile. 

 Preparietal. 



Recorded in many Therapsida, but not elsewhere. 

 Postoptic (see "alisphenoid" ) . 



Sphenethmoid. — The primitive brain-trough, as in the sturgeon and the frog. 

 Later divides into orbitosphenoid and postoptic ( "alisphenoid" of rep- 

 tiles). 

 Splenial. — The typical splenial of the crocodile articulates with the angular, 

 coronoid, surangular and dentary. The "splenial" of Trimerorhachls 

 enters the symphysis and is separated from the angular by the "post- 

 splenial" (see AVatson and Williston below). 

 8upratemporal, the dorsal element, above the squamosal and lateral to the 



parietal. 

 Temporal of Ichthyosaurs, Cuvier (the lateral element, often called supratem- 

 poral, lateral to the quadrate-carrying squamosal). 



Appendix A. — Comments by R. Broom 



\¥hile uniformity in the nomenclature of the cranial elements is de- 

 sirahle, it is quite impossible that it can come about till the homologies 

 of tbe elements founrl in the different vertebrate types has been com- 

 pletely established, wliich will not be for many years. 



In the meantime what I think ought rather to be aimed at is the use of 



