SUBANTARCTIC ISLANDS OF NEW ZEALAND. [Mnl/n 



Ischnochiton luteoroseus, Sutor. 1907. 

 Ischnochlton hdeorosens. Suter, P. Mai. S.. vii. 1907. p. "293. tig. 1 in text. 



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

 smooth. 



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



Also Dusky Round, in 30 fathoms. 



Genus Callochiton, Gray, 1847. 

 DisirUmtion. — British seas, Mediterranean, Magellan Province, Antarctic station 

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

 littoral zone to about 130 fathoms. 



Callochiton puniceus ((iould), lS4(i. 



Chiton puniceus, Gould, P. Bost. S.N.H., ii, 184(3, p. 143 : U.S. Expl. Exp., xii, p. 324, 

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

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

 pi. ix, fig. 10. Callochiton iUuminatus + Ischnochiton [Trachf/dennon) 

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

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

 p. 185; vii, p. 294. CaUochiton {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. 

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

 to Alaska and Japan. (Sur 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. 

 (Jirdle leathery, with sutural tufts. 



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



(Jenus Plaxiphora, Gray, 1847. 

 Distrihution. — Southern extremities of the south(>rn continents : New Zealand, 

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



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



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

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



