Chiton.] AMPHINEURA. 37 



with 1 on each side, and posterior valve with 10 slits, which are close 

 together in the centre, wide apart on the sides ; the slits are not deep ; 

 the teeth blunt, strongly pectinate ; sinus narrow and deep, denti- 

 culate, ; sutural lamina* low, very broad, and flatly convex ; valve- 

 Callus fairly strong, deep blue. 



Length, 39 mm. ; breadth, 23 mm. (type). The largest specimen 

 I have seen was 46 mm. by 27 mm. Divergence, 94 (type) ; with 

 the specimens in my collection it varies from 108 to 115, but in most 

 examples is 110. 



Type in the British Museum. 



Hab. Throughout New Zealand, and a variety at the Auckland 

 Islands ; rather local and not common : Hauraki Gulf (H. S.) ; Cape 

 Egmont (R. Murdoch) ; Queen Charlotte Sound, in 6 fathoms (Captain 

 Bollons) ; Russell (W. H. Webster) ; Cook Strait (Miss Mestayer) ; 

 Lyttelton Harbour and Cape Saunders, Otago (T. Iredale) ; Shag 

 Point and Bluff (Dr. Torr) ; Auckland Islands (Captain Bollons). 



Remarks. Red-coloured specimens are known from Hauraki Gulf 

 and Cook Strait ; the white varieties are from the Bluff and Cape 

 Saunders. The only specimen from the Auckland Islands is brownish- 

 red ; the central areas are not shagreened, and more of the outer 

 furrows extend the whole length than is usually the case. 



6. Chiton canaliculatus, Quoy and Gaimard, 1835. Plate 2, fig. 16 ; 

 Plate 4, fig. 10. 



Chiton canaliculatiis, Q. & G., Voy. Astrol., iii. 1835, 394, pi. 75, f. 37-42; 



Man. Conch. (1). xiv, 177, pi. 36, f. 4-0; P. Mai. S., ii, 196. C. Slangeri, 



Reeve: Pilsbry, Man. Conch. (1). xiv, 177, not of Reeve. C. insculptus, 



A. Adams, P.Z.S., 1852 (1854), 91, pi. 16. f. 4: Wissel, Zool. Jahrb., 

 xx. 655. pi. 21, f. 59-62 ; pi. 24, f. 63 (anatomy). 



Shell small, oblong, strongly elevated, carinated, side slopes straight, 

 steep, pink, sometimes with black spots along the ridge. Anterior valve 

 with 20 to 22 flatly nodulous ribs, some of them bifurcate, posterior 

 margin crenulate, apex smooth, slightly sinuate. Intermediate valves 

 beaked, the jugum with a narrow smooth space, sides with about 

 16 strong longitudinal ribs, more slender near the centre, with deep 

 narrow grooves between them ; lateral areas considerably raised, 

 with 3 mostly bifurcating radiating ribs, which are cut up into low 

 nodules by regular concentric lines ; posterior margins of valves 

 strongly crenulated. Posterior valve with 12 to 16 granose radiating 

 ribs, central area longitudinally costate ; mucro small, sharply pointed 

 slightly in front of the middle, posterior slope a little concave. Girdle 

 with compactly imbricating scales, which are small, convex, shining, 

 and faintly microscopically striated. Colour of end valves and lateral 

 areas pink, central areas yellowish, dorsal ridge pink with an olive- 

 green or black stripe on each side ; sometimes olivaceous, or olive 

 and rose. Interior whitish, microscopically punctate ; anterior valve 

 with 9 (sometimes only 8) slits, intermediate valves with 1 slit on each 



