THE EVIDENCE OF THE SKELETON 



HI 



I have attempted in Fig. 53 to represent this close resemblance 

 between the segmented branchial skeleton of Limulus and of Ammo- 

 cojtes, a resemblance so close as to reach even to minute details, 

 such as the thinning out of the cartilage in the subchordal bands and 



Fig. 60. — Diagram of Ammoccetes cut open to show the Lateral System of 

 Cranial Nerves V., VII., IX., X., and the Branchial Cartilages. 



The branchial cartilages and sub-chordal ligaments are coloured blue, the branchhe 

 red. (jl., glandular substance surrounding the central nervous system and pass- 

 ing into the auditory capsule with the auditory nerve (VIII). 



entapophysial ligaments respectively between the places where the 

 branchial bars come off. 



In Fig. 59 I have shown the prosoma and mesosoma of Limulus, 

 and indicated the nerves to the appendages together with the meso- 

 somatic cartilaginous skeleton. 



In Fig. 60 I have drawn a corresponding picture of the prosomatic 

 and mesosomatic region of Aniuioccetes with the corresponding nerves 



