SUBANTARCTIC ISLANDS OF NEW ZEALAND. [Mollusca. 



Ischnochiton luteoroseus, Suter, 1907. 

 Ischnochiton luteoroseius, Suter, P. Mai. S., vii, 1907, p. 293, fig. 1 in text. 



Length of shell, 5 mm. ; colour, pink and yellowish banded ; girdle-scales 

 smooth. 



Hah. — Bounty Islands, in 50 fathoms (Captain J. BoUons). 



Also Dusky Sound, in 30 fathoms. 



Genus Callochiton, Gray, 1847. 



Distr^ution. — British seas, Mediterranean, Magellan Province, Antarctic station 

 " Gauss," Australasia, Reunion and Mauritius, Cape of Good Hope. From the 

 littoral zone to about 130 fathoms. 



Callochiton puniceus (Gould), 1846. 



ChUon puniceus, Gould, P. Bost. S.N.H., ii, 1846, p. 143 ; U.S. Expl. Exp., xii, p. 324, 

 fig. 412. Chiton illuminatus. Reeve, Conch. Icon., iv, 1847, fig. 147. 

 Chiton dimorfhus, Rochebrune, Miss. Cape Horn, Moll., 1889, p. 142, 

 pi. ix, fig. 10. Callochiton illuminatus + Ischnochiton (Trachydermon) 

 puniceus, Pilsbry, Man. Conch. (1), xiv, p. 51, pi. ix, figs. 92-94; p. 81, 

 pi. viii, figs. 76, 77. Callochiton illuminatus. Reeve : Suter, P. Mai. S., ii, 

 p. 185 ; vii, p. 294. Callochiton (Icoplax) puniceus (Gould) : Thiele, " Die 

 antarktischen und subantarktischen Chitonen," 1908, p. 14. 



Hah. — Snares Islands, in 50 fathoms (Captain J. Bollons). 



Also Kapiti Island and Stewart Island. Common in the Magellan Province. 



Fam. MOPALIIDAE, Pilsbry. 



Genus Mopalia, Gray, 1847. 



Distribution. — Shores of the northern Pacific, extending from Lower California 

 to Alaska and Japan. Our species is the only one on record from the Southern 

 Hemisphere. 



Mopalia australis, Suter, 1907. 



Mopalia australis, Suter, P. Mai. S., vii, 1907, p. 215, pi. xviii, fig. 12. 



Length of shell, 9 mm. ; anterior valve with 8, intermediate valves with 1 slit 

 on each side ; posterior valve with an oblique slit on each side, bisinuate in the middle. 

 Girdle leathery, with sutural tufts. 



Hah. — Snares Islands (Captain J. Bollons). 



Genus Plaxiphora, Gray, 1847. 



Distribution. — Southern extremities of the southern continents : New Zealand, 

 Australia, Tasmania, South Africa, Tristan da Cunha, South America. 



Plaxiphora aucklandica, n. sp. (Plate I, fig. 1.) 



Shell small, elongately oval, depressed, valves very fragile (animal preserved 

 in formol !), dorsal ridge subangular. Colour light brown, jugal tract whitish, white 



