﻿HuTTOJsr. — On the New Zealand Cliitonidse. 179 



a small central point ; terminal and lateral areas raised above the rest 

 minutely punctate ; median areas minutely punctate, sometimes with a row 

 of deep longitudinal pits along the anterior edges of the raised lateial ai'eas. 



Length, -75 inch ; breadth, '3 inch. 



Colour. — Uniform yellowish pink. 



Founded on two specimens in the Colonial Museum, locality not stated. 



Chiton rudis. sp. nov. 



Oblong ; margin with minute scales ; valves elevated, flattened on the 

 sides, not keeled j apex of anterior valve recurved, with its posterior margin 

 slightly convex at the sides, and deeply concave in the centre ; posterior 

 margins of intermediate valves straight ; posterior valve rather small ; apex 

 posterior pointing and emarginate ; anterior valve, and lateral areas, with 

 radiating moniliform ribs; posterior and median areas widely, but rather 

 irregularly, deeply longitudinally furrowed, with narrow I'idges between. 



Length, 1*75 inch; breadth, "75 inch. 



Colour. — Margin grey, with broad irregular reddish brown transverse 

 bands ; valves greyish brown ; interior greyish white. 



Founded on a specimen in the Colonial Museum, locality not stated. 



Genus Tonicia. Gray. 



Margin of the mantle simple, naked, nearly smooth, or velvety ; last 

 valve entire. 



South America, Australia, Greenland. 



Tonicia undulata. 



Ch. undulatus, Quoy and Gaim., "Voy. Astrol." Acantliopleura undulata,.^ 

 Gray, '' Diefi'." Yol. IL, p. 245. 



Oval ; valves rounded, polished, sub-carinate ; posterior margins straight, 

 produced into a rather acute central point ; terminal area of anterior valve, 

 and lateral areas of intermediate valves, with indistinct radiating moniliform 

 ridges ; posterior valve, and median areas of anterior and intermediate valves 

 with waved transverse strise. 



Length, 1-15 inch ; breadth, -55 inch. 



Colour. — Mantle reddish brown ; valves generally green, inclining, more 

 or less, to yellowish on the back, with the waved strise brown ; sometimes the 

 valves are greyish green, with many of the undulating sti'ise white. 



Not uncommon under stones at low water. 



