BRACHIOrOD A—THOMSON. 
31 
In the ventral valve the hinge teeth spring from the sides of the valve, and are 
not supported by dental plates. The cardinalia, septum and loop of the dorsal valve 
are all typically Magellaniform. Compared with Magellania flavescens, the septum 
is short, the hinge plates broader and less pointed in front, the cardinal process broader, 
and the loop more delicate. In the fully grown specimen no trace of the connecting 
band with the septum remains, not even in the form of a projection on the dorsal side 
of the primary lamellse, but in a specimen of 13 mm. in length, the connecting bands 
almost reach the septum as two needle like spurs. A young individual of 6 mm. in 
length is in the Magadiniform loop stage. 
The species with which Magellania macquariensis is to be compared is undoubtedly 
Waldheimia smithi Pfeffer from South Georgia, known from a single individual. Some 
of the Macquarie Island specimens agree in many respects with Pfeifer's figure, but 
they lack the anterior indentation of that species, and the youthful growth lines are 
sub-orbicular instead of being elongated ovate with a straight front. Further study 
will probably reveal other differences between the species, the internal characters of 
Waldheimia smithi being as yet unknown. 
Genus Terebratella d'Orbigng, 1817. 
. Genotype Anomia dors at a Gmelin. 
Terebratella sanguinea ( Leach .) 
1814. Terebratula sanguinea Leach, Zool. Misc., p. 76, tab. XXXIIL 
1817. Terebratula cruenta Dillwyn, Descript. Cat. Recent Shells, vol. 2, p. 295. 
1841. Terebratula zelandica Deshayes, Revue Zool. Soc. Cuv., p. 359. 
1846. Terebratula rubra Sowerby, Thes. Conch., vol. 1, p. 345, plate LXYIII, 
figs. 9-11 (not of Pallas). 
1852. Terebratella Evansii Davidson, Proc. Zool. Soc., p. 77, plate XIV, figs. 
7-9. 
1905. Terebratella sanguinea Hutton, Trans. N.Z. Inst., vol. 37, p. 447. 
(For fuller synonymy consult Davidson, Trans. Linn. Soc., vol. 4, pt. 2, p. 87, 
1887 and Suter, Man. N.Z. Moll., p. 1074, 1913.) 
A single specimen of 7 mm. length dredged in 40 fathoms from the east of 
Enderby Island, Auckland Islands, by Mr. Edgar Waite, agrees well with young examples 
of. the common New Zealand species Terebratella sanguinea. It has not before been 
recorded from the outlying islands of New Zealand. 
Terebratella vel Magellania sp. 
(Plate XV, figs. 11, 12.) 
Habitat. —Station 10; off Shackleton Glacier (Davis Sea), 325 fathoms, 29th 
January, 1914. Sea-bottom ooze, temperature 1-65° C, 
