— 68 — 

 Sect. 12. Oiiithocliitoii Gray. 



Valvae traiisversae, externae; lamina Insertionis valvse anticfe paaci- 

 lobata, posticae suberaarginata, integra, mediaram büobataj limbus cor- 

 neus setis brevibus deuse obsitus. 



Species examinala. 

 Chiton undulatas Quoy. Australia, 



Sect. 13. Enoplochitoii Gray. 



Valvcö transversae, subcordiformes , externae ^ lamina insertionis 

 valvae anticae paucilobata, postica; subobsoleta, integra et recedens, me- 

 diarum bilobataj limbus copneus, squamis oblongis calcareis incqualibus 

 proslratis sparse onustus. 



Species examinala. 

 Chiton niger Barnes. Chili. 



f ra c/^/ ' Sect. 14. Aulacochiton Shultl. 



tu^^^ Valva?, transversae, externae^ lamina insertionis valvae anticae pauei- 

 obata, posticae profunde emairginatae obsolete lobata, niediarum bilobata; 

 limbus postice fissus, squamis parvis ovatis inordinatis densissime ob- 

 situs. 



> Species examinala. 



Chiton Volvox Reeve. Australia. 

 Huc etiam ex icone pertinere videtur, 



Chiton cimolius Reeve. Australia. 



Sect. 15. Schizochitoii Gray. 



Valvae subcordiformes, elongatae, externa?^ lamina insertionis val- 

 varum terminalium paucilobata, posticae profunde fissa, mediarum sub- 

 trilobata; limbus latus, corneus, postice fissus, squamulis minutis are- 

 naceis et aliis cylindraceis curvatis sparse obsitus. 



Species examinala, 

 Chiton incisus Sowb. Ins. Philipp. 



Sect. 16. Mopalia Gray. 



„Valvae transversae externa? j lamina insertionis modica, valva an- 

 ticae — ?, posticae lobo rotundo praedita; limbus modice latus, postice 

 augustior, setosus" ex Gray. 



Sectio mihi ignotaj huc refert Gray species sequentes, 

 Chiton Hindsli Soub. Amer. oce. 



„ Simpsonii Gray. „ 



„ Blainvillei Sowb. Ins. Lobos. 



