. The Australian zoologist. Zoology; Zoology; Zoology. IREDALE AND HULL. 137 48. Hemiarthrum hamiltonorum. sp. nov. (Plate figs. 9-15.) 1916. Hemiarthrum setulosum Hedley, Austr. Antarctic Exped., 1911-1914, Sci. Rep. Ser. C. Zool., Vol. iv., 34. Macquarie I. 1926. Hemiarthrum setulosum Finlay, Trans. Inst., 57, 332. [Not Hemiarthrum setulosum Dall, Bull. Nat. Mus., iii., 44 (February), ex Cpr. MS. Kerguelen I.] Finlay published Iredale's note: "The Macquarie Island shells appear to be a little different, the sculpture being finer and the mucro of the posterior valve near
. The Australian zoologist. Zoology; Zoology; Zoology. IREDALE AND HULL. 137 48. Hemiarthrum hamiltonorum. sp. nov. (Plate figs. 9-15.) 1916. Hemiarthrum setulosum Hedley, Austr. Antarctic Exped., 1911-1914, Sci. Rep. Ser. C. Zool., Vol. iv., 34. Macquarie I. 1926. Hemiarthrum setulosum Finlay, Trans. Inst., 57, 332. [Not Hemiarthrum setulosum Dall, Bull. Nat. Mus., iii., 44 (February), ex Cpr. MS. Kerguelen I.] Finlay published Iredale's note: "The Macquarie Island shells appear to be a little different, the sculpture being finer and the mucro of the posterior valve nearly median and a little elevated, while in the extra- limital shell the mucro is elevated and ; The generic description covers this species, and the detail figures show all the points emphasised, the mucro, however, being shown more posterior than usual. The species is named for the two Hamiltons, father and son, who both collected on the Subantarctic Islands. Dimensions: 10 x 5 mm. Station: On rocks washed by the sea at low water. [49. Mopalia australis. 1907. Mopalia australis Suter, Proc. Mai. Soc, vii., 215, pi. xviii., fig. 12a. Snares I., New Zealand. Type in Coll. Suter now in the Wan- ganui Museum. 1909. Mopalia australis Suter, Subant. Islands of , 2. 1913. Mopalia australis Suter, Man. 16. Atlas, pi. 3, figs. 12, 12a. 1915. Acanthochiton australis Iredale, Trans. Inst., 47, 1914, 420, 425. 1926. Mopalia australis Ashby, Proc. Mai. Soc, xvii., 32 (nothing). Suter described a curious little shell thus: "Shell very small, elongately oval, with a blackish leathery girdle and sutural tufts. Anterior valve with eight slits, teeth smooth. Intermediate valves with a rounded central posterior projection; insertion-plates with one slit. Posterior valve depressed, with an oblique slit on each side, and bisinuate in the middle behind. Girdle narrow, leathery, slightly broader on the sides, with a few sutural spicules. Colour probably ash
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1914
