The ?{atural History of the Frilled Shar}{ 



267 



Text-figure 7 Text-figure 8 



Dorsal view of the head of Chlamydoselachus. Note The head of Chlamydoselachus as seen from below, 



the position of the spiracles, the form and number of Note the long narrow lower jaw, the position of the 



the gill-slits, the position of the lateral hne and of the nostrils and of the eyes, and the long gill-covers — 



pectoral fins. the first being "free from the isthmus." 



After Garman, 1885.2. After Garman, 1885.2. 



MOUTH AND JAWS 



The mouth is nearly terminal in position in the flat sub'triangular head. This is in 

 marked contrast with its position in most other sharks, where the mouth is ventral and 

 set so far back that it leaves an overhanging snout. The lower jaw is loosely articulated, 

 both at its apex and also proximally where it is attached to the head. This may be seen in 

 every lateral view of the shark, particularly in Giinther's drawing (Figure 1, plate I). It 

 is especially well portrayed in Collett's lateral view of the head (Figure 6, plate II), and 



