POLYPLACOPHORA. 



Section Cryptm-onchus Blv. 

 Section Loboplax Pils. 

 Genus (?) Leptophix Cpr. 



Genus Katharinu Gray. 

 * 



Genus Amicula Gray. 



* 



Genus Cryptochiton Midd. 



Family Cryptoplacidce Dall. 



Genus Cryptoplax Blainv. 

 Genus Choneplax Cpr. 



III. Superfamily TELEOPLACOPHORA. 

 Family Chitonidce Pilsbry. 



Subfamily Chitoninae Pilsbry. 

 Genus Chiton Linn., p. 149. 



Section Radsia Gray, p. 189. 

 Section Sclerochiton Cpr., p. 188. 

 * 



Genus Eudoxochiton Shuttlw., p. 192. 



Subfamily Toniciinae Pilsbry. 

 Genus Tonicia Gray, p. 194. 



Section Fannettia Dall, p. 212. 

 Genus Acanthopleura Guild.', p. 213. 

 Subgenus Mesotomura Pils., p. 218. 

 Subgenus Acanthopleura s. s., p. 219. 

 Subgenus Maugeria Gray, p. 226. 

 Subgenus Amphitomura Pils., p. 230. 



Subfamily Liolophurime Pilsbry, p. 232. 



Genus Schizochiton Gray, p. 234. 



* 



Genus Lorica Ads., p. 236. 

 Section Loricella Pils., p. 238. 



.. 



Genus Enoplochiton Gray, p. 252. 

 Genus Onitlmdiiton < iray, p. 244. 

 Genus Lioloplmra Pilsl.ry, p. 239. 



