teleii. 



Fig. 1 



Fig. I. Dorsal view of the brain of Plct- 

 bedon gluti>iosus. x 12 



I-X, the cranial nerves; (.elen, telence- 

 phalon; dien., diencephali^n; nicsen., mesen- 

 cephalon; mcten., metenceithalon; mcd., 

 medulla oblongata; cord, spinal cord; ejiiph., 

 epiphysis. 



Fig. 2 



Fig. 2. Diagram of the cranial nerves of Plet- 

 hedon glutinosns. .\ 12 



Oblique shading represents the brain; vertical 

 shading, bone; dotted shading, cartilage. The 

 broken line represents the outline of the head; I-X, 

 the cranial nerves; Gg., Gasserian ganglion; hyo., 

 hyo-mandibular; max., maxillary; mand., mandi- 

 bular; oph., ophthalmic; pal., palatine; tl., tm., 

 and tv., lateral, mesial and ventral, terminal 

 branches of V. 



