Volume 31, 1898
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Genus Chiton, Linné (1758).
Key to Species.
| A. Central areas having longitudinal riblets. | |
| B. Sides and ridge of central areas both sculptured. | |
| C. Lateral areas with numerous slightly crenulated threads. | |
| D. Intermediate valves carinated, divergence 120° | C. quoyi. |
| CC. Lateral areas with 3 or 4 rows of distinct tubercles | C. pellis-serpentis. |
| BB. Central areas with a smooth band or triangle on ridge of each valve. |
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| C. Lateral areas with 4–6, pleura 16 or more, granose riblets | C. canaliculatus. |
| CC. Lateral areas with 4–8 divaricate riblets, pleura 20 furrows on each side | C. œreus. |
| CCC. Lateral areas with 2–4, pleura 8–14, nodulose riblets. | |
| D. Girdle-scales mucronated | C. limans. |
| DD. Girdle scales not mucronated | C. stangeri. |
| AA. Central areas smooth, no longitudinal ribs | C. sinclairi. |
C. quoyi, Deshayes.
Man. N.Z. Moll., p. 112.
Viridis, Q. and G., and glaucus, Gray, are synonyms.
C. œreus, Reeve.
Man. N.Z. Moll., p. 112. (N. Zeal.?).
C. pellis-serpentis, Quoy and Gaimard.
Man. N.Z. Moll., p. 111.
C. sinolairi, Gray.
Man. N.Z. Moll., p. 111.
C. canaliculatus, Quoy and Gaimard.
Man. N.Z. Moll., p. 112.
Stangeri, Pilsbry (not of Reeve), and insculptus, A. Ad., are synonyms.
C. stangeri, Reeve.
Man. N.Z. Moll., p. 111.
C. limans, Sykes.
Pilsbry, Man. Conch. (1), vol. xiv., p. 175, pl. xxxvii., figs. 12, 13.
Muricatus, A. Adams, and sulcatus, Hutton (not of Q. and G.), are synonyms.