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 shallow grooves. 



Dim. — Length, 16'25 mm.; width, 11*5 mm.; depth, 7 

 mm. The largest is 14 mm. wide. Another is 17'5 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, and the dorsal bridge has posteriorly a blunt 

 central projection instead of a sinus. 



Magellania flavescens, Lamarck. 



Terebratula flavescens, Lamarck, Anim. S. Vert., vol. iv., 

 1819, p. 246, also vol. vii., 1836, p. 330. Type locality— The 

 seas of India to Java. Conch. -Cab., Band vii., Abt. i., p. 45, 

 sp. 27, pi. 2d, fig. 4. 



Terebratula australis, Quoy and Gaimard, Voy. de l'Astr., 

 1834, Moll., vol. v., p. 551, pi. lxxxv., figs 1-5, Port Western, 

 Vict, j Sowerby, Thes. Conch., 1847, p. 349, sp. 13, pi. lxix., figs. 

 25-33. 



Terebratula dentata, Lamarck, Anim. S. Vert., 1836, vol. 

 vii., p. 331. Type locality — The southern seas (?), Peron. 



Terebratula incurva, Quoy and Gaimard, loc. cit., p. 554, 

 pi. lxxxix., figs. 11 and 12. 



Waldheimia flavescens, Lamarck, Reeve, Conch. Icon., 1860, pi. 



I and 2, figs, la, b; Tenison- Woods, Proc. Roy. Soc, Tasm., 

 1878 (1877), p. 57, north coast of Tasmania; Davidson, 

 "Challenger" Rep. Zool., vol. i., 1880, p. 41, pi. iii., figs. 10- 

 12; also, Proc. Linn. Soc, Lond., vol. iv., 1886, p. 41, pi. vii., 

 figs. 6-19; Hedley, Memoirs Austr. Mus., vol. iv., 1902, p. 289, 



II to 15 fathoms, off the Crookhaven River. 



Magellania flavescens, Lamarck, Tate and May, Proc. Linn. 

 Soc., New South Wales, vol. xxvi., 1901, p. 441. 



Found all along the South Australian coast, 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. 



