EXPLANATION OP PLATES. 

 Wax plate reconstruction of the cbondrocranium of a pig, x 25. Length of 

 head 12 mm., total length (head-rump measurement) 30 mm. All the plates 

 are reduced to i/i the size of the reconstruction. 



Plate I. Dorsal view of the chondrocranium. sul.suprasep., sulcus supra- 

 septalis com.sphctio-cth., commissura spheno-ethmoidalis ; rec.lat.sup., reces- 

 sus lateralis superior ; rec.post., recessus posterior ; pr.cUn.post., processus 

 clinoideus posterior; r.fo):fac., roof over the facial nerve; *, opening In the 

 thin lamella of cartilage between the basal plate and the auditory capsules; 

 fis.orb.sup., fissura orbitalis superior; fis.orb.nas., fissura orbito-nasalis ; 

 fen>.crib., fenestra cribrosse. 



