MOLLUSCA.—HEDLEY. o7 
Compared with Gould’s illustration the Macquarie shells are more regularly oval, 
the dorsal and ventral margins more parallel and the anterior end rounder. Instead 
of being bright red, ours are chocolate brown edged on the margin with buff. Ours 
seem smaller than the type, for the largest among a couple of hundred shells are only 
4 instead of 5mm. long, and 2% instead of 3mm. high. A Macquarie Island shell is, 
therefore, here figured to illustrate the discrepancy, if such there be. 
It was found to be common in clusters on rocks above and below high-water mark 
and on kelp in Garden Bay and Hassellborough Bay, Macquarie Island, by Mr. Harold 
Hamilton. 
AXINOPSIS DEBILIS Thiele. 
Axinopsis debilis Thiele, Deutsch. Stidpol. Exped., xiii., 1912, p. 232, pl. xviii., fig. 25. 
One specimen, 6:5 long, 7 high, and 3mm. in depth of conjoined valves, was dredged 
January 31st, 1914, in 358 fathoms, ooze, off the Shackleton Ice-shelf, in South Lat. 
64° 44’ and Hast. Long. 97° 28’. Two others, January 29th, 1914, in 325 fathoms, ooze, 
off the Shackleton Ice-shelf, in South Lat. 65° 6’ and Hast Long. 96° 13’. 
LATERNULA ELLIPTICA King and Broderip. 
Anatina elliptica King and Broderip, Zool. Journ., v., 1831, p. 335; Jd., Griffith and 
Pidgeon, Anim. Kingdom, xii., 1834, p. 595, pl. xx., fig. 3; Id., Reeve, Conch, 
Icon., xiv., 1860, Anatina, pl. ii., fig. 14; JId., Smith, Chall. Rep. Zool., xiii, 
1885, p. 76; Id., Smith, “ Southern Cross” Coll., 1902, p. 210, pl. xxv., figs. 
9,10; Jd., Lamy, lst Expéd. Antarct. Frang., 1906, p. 14; Jd., Smith, Nat. 
Antarct. Exped., il., 1907, Lamell., p. 1, pl. 11., fig. 3; Jd., Melvill and Standen, 
Trans. Roy. Soc. Edinb., xlvi., 1907, p. 151; Jd., Scotia Zool., v., 1907, p. 121 ; 
Id., Lamy, 2nd Expéd. Antarct. Frang., 1911, Moll., p. 21; Id., Hedley, Brit. 
Antarct. Exped., i., 1911, p. 3; Jd., Thiele, Deutsch. Siidpol. Exped., xiii., 
1912, p. 256; Id., Smith, “ Terra Nova” Exped., Zool., 11., 1915, p. 78; Id., 
Lamy, Bull. Mus. Hist. Nat., xxi., 1915, p. 74. 
Anatina prismatica Sowerby, Proc. Zool. Soc., 1834, p. 87. 
A considerable series, which vary a good deal in proportion of height to length, 
of empty shells and separate valves were taken, September 4th, 1912, in 12 fathoms, 
in Commonwealth Bay, on a bottom of small stones and weed. 
The genus Laternula* was introduced for Mya truncata Linne, and Solen anatinus 
Linne. The former being a typical Mya, it is convenient to regard S. anatinus as the 
type of Laternula taking precedence, as Dr. Dall has already remarked, over Anatina 
proposed for the same type by Lamarck in 1809. 
* Bolten.—Mus. Bolt., ii., 1798, p. 155. 
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