MOLLUSCA.- HEDLEY. 
27 
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. Siidpol. Exped., xiii., 1912, p. 232, pi. 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 East. Long. 97° 28'. Two others, January 29th, 1914, in 325 fathoms, ooze, 
off the Shackleton Ice-shelf, in South Lat. 65° 6' and East Long. 96° 13'. 
Laternula elliptic a King and Broderip. 
Anatina elliptica King and Broderip, Zook Journ., v., 1831, p. 335 ; Id., Griffith and 
Pidgeon, Anim. Kingdom, xii., 1834, p. 595, pi. xx., fig. 3 ; Id., Reeve, Conch, 
Icon., xiv., 1800, Anatina, pi. ii., fig. 14 ; Id., Smith, Chalk Rep. Zook, xiii., 
1885, p. 76 ; Id., Smith, “ Southern Cross ” Colh, 1902, p. 210, ph xxv., figs. 
9, 10 ; Id., Lamy, 1st Exped. Antarct. Fran 9 -, 1906, p. 14 ; Id., Smith, Nat. 
Antarct. Exped., ii., 1907, Lamelk, p. 1, ph iik, fig. 3 ; Id., Melvill and Standen, 
Trans. Roy. Soc. Edinb., xlvi., 1907, p. 151 ; Id., Scotia Zook, v., 1907, p. 121 ; 
Id., Lamy, 2nd Exped. Antarct. Fran§., 1911, Moll., p. 21 ; Id., Hedley, Brit. 
Antarct. Exped., ii., 1911, p. 3 ; Id., Thiele, Deutsch. Siidpol. Exped., xiii., 
1912, p. 256 ; Id., Smith, “ Terra Nova ” Exped., Zook, ii., 1915, p. 78 ; Id., 
Lamy, Bulk Mus. Hist. Nat., xxi., 1915, p. 74. 
Anatina prismatica Sowerby, Proc. Zook 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 Bolen anatinus 
Linne. The former being a typical Mya, it is convenient to regard S. anatinus as the 
type of Laternula taking precedence, as Dr. Dali has already remarked, over Anatina 
proposed for the same type by Lamarck in 1809. 
* Bolten.—Mus. Bolt., ii., 1798, p. 155. 
