﻿176 Transactions. — Zoology. 



Genus Chiton. Lin. 



Mantle covei'ed with scales ; exposed portion of the valves broader than 

 long. All parts of the world. 



A. Scales distinct (Lophyrus). 



Chiton concentricus. 



Chiton concentricus, Reeve, "Conch. Icon.," pi. 16, f. 95. Lophyrus concen- 

 tricus, Angas, " Pro. Zool. Soc," 1867, p. 221. 



Oval ; mantle with rather large scales ; valves compressed on each side, 

 keeled ; posterior margins pointed ; terminal and latei'al areas closely concen- 

 trically ribbed ; median areas distinctly longitudinally ribbed ; dorsal line 

 smooth. 



Length, 1 inch ; breadth, '5 inch. 



Colour. — Mantle white or pinkish, irregularly banded with yellowish brown ; 

 termiiaal and lateral areas yellowish brown, median areas white with yellowish 

 brown ribs. 



This species is also found in Australia. 



There are several specimens in the Colonial Museum, locality not stated, 

 probably dredged. 



LTnder stones at very low tide (Angas). 



Chiton canaliculatus. 



Chiton canaliculatus, Quoy and Gaim., " Yoy. Asti^ol.," Vol. III., p. 394. 

 Chiton canaliculatus, Desh., " Anim. sans Vert," Yol. VII., p. 502. 



Oblong ; mantle with moderate sized scales ; valves compressed on each 

 side and keeled ; posterior margins straight, crenulated on their sides ; terminal 

 and lateral areas with radiating moniliform lidges ; median areas with longi- 

 tudinal ridges ; dorsal line smooth. 



Length, 1 inch ; breadth, "5 inch. 



Colour. — Mantle pink, with about twenty transverse yellowish pink bands ; 

 terminal and lateral areas deep pink ; median areas yellowish pink, sometimes 

 longitudinally varied with black. 



Several specimens are in the Colonial Museum, which were dredged off the 

 island of Kapiti, in Cook Straits. 



Chiton pellis-serpentis. 



Chitoijfi pellis-serpentis, Quoy and Gaim, " Voy. Astrol," Vol. III., p. 381. 

 Chiton pellis-serpentis, Desh., "Anim. sans Vert.," Vol. VII., p. 508. 



Oval ; mantle with moderate sized scales ; valves elevated, rounded, solid, 

 opaque ; posterior margins curved, meeting in an obtuse point on the back ; 



