THE VOYAGE OF H.M.S. CHALLENGER 



CHITONES IRREGULARES 



SCHIZOIDEA 



Lorica volvox 

 Scliizochiton incisus 



Placiphoroidea 



Plaxiphora carmichaelis 

 „ simplex ■ 



,, carpenteri 



Mopaloidea . 



Acanthochiton garnoti 



Cryptoidea . 

 Chitonelloidea 



Cryptoplax larvceformis 



„ striafus 



„ oculatus 



„ burrowi 



Affinities of the Chitonelloidea with the other Polyplacophora 



PAGE 



31 

 31 

 31 

 31 



32 

 32 

 33 

 34 



35 

 35 

 36 

 36 

 37 

 39 

 41 

 42 



45 



