96 
band; the side pieces are shallow and project obliquely for- _ 
ward: the dorsal band is longitudinally wide, concave dor- 
sally, projecting well in advance of the ventral band, and 
with a deep, nearly square, sinus in its posterior edge (whence 
the specific name). 
Sculpture.—Longitudinal ribs, about 12 at first, ‘flatly 
triangular, crenulating the edge of the foramen, and in- 
creasing by trichotomous division. Growth lines scarcely 
visible; some irregularly- distant concentric ehallow, grooves. 
Dim.—Length, 16°25 mm.; width, 11°5 mm.; depth, 7 
mm. ‘The largest is 14 mm. wide. Another is. ITS mm. 
by 12°25 mm. 
Locality.—Type locality, at 130 fathoms, off Cape Jaffa, 
37 examples, all dead (7 probably nearly or quite full grown, 
5 small, and 25 very small); also, at 300 fathoms, 4 mature, 
13 small, and 76 very small. 
Diagnosis.—T. cancellata, Koch, is closely allied, but is 
flatter, has more numerous, rounder, rougher riblets arising 
by irregular intercalation; its loop is wider, and has nar- 
rower bands, andthe dorsal bridge has posteriorly a blunt 
central projection instead of a sinus. 
Magellania flavescens, Lamarck. 7, 
Terebratula flavescens, Lamarck, Anim. §. Vert., vol. iyv., 
1819, p. 246, also vol. vii., 1836, p. 330. Type locality—The 
seas of India to Bae Conch. -Cab., Band vii., Abt. i., p. 45, 
sp. 27, pl. 2d, fig. 4 
Terebratula australis Bp uoy and CSTE Voy. de |’Astr., 
1834, Moll., vol. v., p. M Ixxxv., figs 1-5, Port Western, 
Vict. ; Sowerby, Thes. Cont. 1847, p. 349, sp. 13, pl. Ixix., figs. 
Terabratila dentata, Lamarck, Anim. S. Vert., 1836, vol. 
vii., p. 331. Type locality —The southern seas (P), Peron, 
Terebratula incurva, Quoy and Gaimard, loc. cit., p. 554, 
pl. Ixxxix., figs. 11 and 1 
Waldheimia flavescens, Hamers Reeve, Conch. Icon., 1860, pl. 
1 and 2, figs. la, 5; Tenison- Woods, Proc. Roy. Soc., Tasm., 
1878 (1877), p: north coast of Tegner Davidson, 
“Challenger”? Rep. Fool -, vol. i., 1880, p. aft ? figs. 10- 
12; also SO, Proc. Linn. Soc., Lond., vol. iv., 1886) p pl. vii., 
figs. 6-19; Hedley, Memoirs Austr. Mus., vol. iv. “3 P1903, p. 289, 
11 to 15 fathoms, off the Crookhaven River. 
Magellania flavescens, Lamarck, Tate ete ite! Proc. Linn. 
Soc., New South Wales, vol. xxvi. -, 1901, p. 
Found all along the South eee a et as far as 
Point Sinclair. Dredged alive at all depths from 6 to 30 
fathoms in numbers; at 40 fathoms, off Beachport, 10, from 
very minute to 1 quarter-grown; and at 100 fathoms, 19 
minute, alive. 
