34. AUSTRALASIAN ANTARCTIC EXPEDITION. 
1889, p. 102; Jd., Melvill and Standen, Journ. of Conch., ix., 1898, p. 105, 
and x., 1901, p. 47; Jd., Stempell, Zool. Jahrb. Suppl., iv., 1899, p. 240; Id., 
Melvill and Standen, Trans. Roy. Soc. Edinb., xlvii., 1907, p. 151. 
The form thus identified attains a length of 8mm. A dozen were found by Mr. H. 
Hamilton, at Macquarie Island ; some among worm tubes and sand below low tide level 
in Garden Bay ; some embedded in growing sponges below low tide level in Lusitania 
Bay; and a small pair attached to a worm tube in Aerial Cove. 
Crass AMPHINEURA. | 
LEPIDOPLEURUS KERGUELENENSIS Haddon. 
Leptochiton kerquelenensis Haddon, Chall. Rep. Zool., xv., 1886, p. 12, pl. i., fig. 3. 
Leptochiton pagenstechert Martens and Pfeffer, Jahrb. Hamburg Wiss. Anst., ill., 1887, 
p- 107, pl. in., fig. 3. 
Lepidopleurus kerquelenensis Pilsbry, Man. Conch., xiv., 1892, p. 12, pl. i., figs. 14-17 ; 
Id., Thiele, Deutsch. Siidpol. Exped., x., 1908, p. 9, and Deux. Expéd. Antarct. 
Frang., Moll., 1911, p. 38; Jd., Melvill and Standen, Trans. Roy. Soc. Edinb., 
xlviii., 1914, p. 343. 
Six specimens, the largest 5mm. long, were taken on rocks at Macquarie Island 
by Mr. H. Hamilton. 
HEMIARTHRUM SETULOSUM Dall. 
Chiton castaneus Gould, Am. Expl. Exped., xii., Moll., 1852, p. 326, pl. xxvii., figs. 4-11 
(preoccupied by Wood, 1815, and by Quoy and Gaimard in 1834). 
Hemiarthrum setulosum Dall, Bull. U.S. Nat. Mus., 11., 1876, p. 44, and iv., 1878, p. 314; 
Id., Smith, Phil. Trans., vol. 168, 1879, p. 183; Jd., Haddon, Chall. Rep. 
Zool., xv., 1886, p. 14, pl. 1. fig. 4, pl. i, fig. 4; Jd., Martens and Pfeffer, 
Jahrb. Hamburg Wiss. Anst., ii., 1887, p. 108, pl. ili., fig. 4. 
Acanthochiton couthouyi +- A. stygyma Rochebrune, Miss. Scient. Cap Horn, 1889, Moll., 
p. 133, pl. ix., fig. 2. 
Hemarthrum setulosum Pilsbry, Man. Conch., xiv., 1892, p. 20, pl. v.; Id., Thiele, 
Deutsch. Tiefsee Exped., Bd. ix., 1906, p. 330, and Deutsch. Siidpol. Exped., 
x., 1908, p. 11, pl. 1., figs. 4-12, and Deux. Expéd. Antarct. Frang., Moll., 1911, 
p. 33; Id., Lamy, Bull. Mus. Oceanograph., ii., 1911, p. 40; Jd., Melvill and 
Standen, Trans. Roy. Soc. Edinb., xlviii., 1914, p. 343; Jd., Bull. Mus. Hist. 
Nat., xxi., 1915, p. 68. 
This small brown chiton was discovered in the Straits of Magellan, rediscovered 
at Kerguelen Island, and subsequently reported from New Georgia, South Orkneys, 
and Grahams Land. It now makes an appearance in the Australian Quadrant. 
