164 



Bashford Dean Memorial Volume 



ML ^rTmrr—, md 



PDL 



Text-figure 46. 

 The antero'dorso-Iateral plate figured from the outside. 



f(d, condyle; XII, anterior lateral canal; AL, position occupied by 



antero-lateral plate; MD, by median-dorsal; PDL, by postero- 



dorso-lateral; PL, by postero-lateral. 



Similar explanations apply to succeeding figures. 



Text-figure 47- 

 The antero-dorso-Iateral plate viewed from the 



inside. 

 J(d, condyle; i(db, condyle basis; rg, ridge supporting condyle; 

 X, place where process on EB touches ADL. 



47 )<^h). In the front it stands as a high, relatively narrow ridge (rg). Backward it be' 

 comes gradually lower and broader and at last runs over into the surface of the plate. 

 Immediately under the condyle is a plane, well limited place (Text-figure 47 ^)- The 

 process of the joint socket on £6 (head roof) touches this part of ADL. It will be described 

 in more detail further on. 



A very distinct line, running nearly parallel to the front margin of the plate, divides 

 the overlapping margin. Here ADL is thinner and its surface striped with many small 

 grooves. To the upper part of this margin VDL was attached (Text-figure 47 PDL). 

 The hind corner of it is again sharply divided from the upper part. It is more impressed 

 and the grooves are much deeper and run at a sharp angle to the grooves of the upper part 

 of the overlapping margin (Text-figure 47 PL). Here PL comes in contact with ADL. 



The long condyle on ADL, corresponding to the joint socket on EB, enables us to 

 define exactly the position of ADL and its angle to the vertical Hne. In Text-figure 48 



