322 Transactions. 



Helcioniscus mestayerae, n. sp. Plate XVIII, figs. 7-9. 



Shell solid, oval, slightly narrower in front, depressed-coni- 

 cal ; apex at about the front fourth, sharply pointed. Surface 

 sculptured with numerous (about fifty) broad depressed radiat- 

 ing ribs which are crossed by fine concentric striae. Colour 

 dark-olive with rather distant indistinct bluish-grey radiating 

 bands. 



Interior bluish-grey, with a silvery lustre. There are at 

 irregular intervals about eleven broad radiating areas with chest- 

 nut-coloured spots and patches, sometimes arranged in a divari- 

 cating pattern ; between these areas are several radiating bands 

 of an alternately darker and lighter grey colour. These charac- 

 ters are very distinctly visible when the shell is held up against 

 the light, and give it a very beautiful appearance. The central 

 callus is well defined ; its colour is reddish-orange, lighter near 

 the margin, finely and minutely dotted with yellow. The 

 muscle-scar is about 3 mm. broad, but slightly impressed. 



Length, 49 mm. ; breadth, 39 mm. ; altitude, 14 mm. 



Hob. — Stewart Island. 



Type in Miss Marjorie K. Mestayer's cabinet. 



I have great pleasure in naming this beautiful species in 

 honour of our most enthusiastic conchologist, Miss M. K. Mes- 

 tayer. 



The animal is unknown. It is quite distinct from any New 

 Zealand species of Helcioniscus I have seen, but the general 

 characters approach those of H. radians, Gm., more than of any 

 other species. 



Haliotis australis, Gmelin (1792). 



Haliotis rugoso-plicata, Chemnitz, Conch. Cab., vol. x. 1788, 

 p. 311, fig. 1604. Haliotis australis, Gmelin, Svst. Nat., 

 xiii, 1792, p. 3689. 

 The above-quoted volume of Chemnitz being polynomial, 



the name given to the species by Gmelin should be used. 



Haliotis virginea, Gmelin (1792). 

 For the same reason, Gmelin instead of Chemnitz should 

 be recognised as author of the species. For both data I am 

 indebted to Mr. Hedley. 



Fissurella huttoni, nom. mut. 

 Fissurella squamosa, Hutton, Cat. Mar. Moll. N.Z., 1873, p. 42. 



The specific name squamosa being preoccupied by Deshayes, 

 I propose to name the only New Zealand species of the genus 

 in honour of Captain F. W. Hutton, F.R.S., &c. The type is 

 in the Colonial Museum. 



