121 



away. Suture distinct, faintly margined. The accremental 

 striae indicate a slightly concave outer lip. 



Dim. — Length, 6 mm. ; breadth 1*4 mm. 



Locality/. — Type dredged in 104 fathoms 35 miles south- 

 west of Neptune Islands, with three others, all imperfect. 



Diagnosis. — Though incomplete, its characters are so dis- 

 tinct a.s to readily separate it from all other South Australian 

 forms. It resembles T . kimberi, Verco, in its long narrow 

 form, its simple mouth and spiral striae; but T. kimberi has 

 a very acute apex, its whorls are all convex, and its spirals 

 are narrower and higher. It differs from T. atkinsoni in its 

 smaller size, narrower form, and the roundness of its later 

 whorls. 



Type in my collection. 



Turritella smithiana, Donald. 



Turrit ella (Colposplra) Smithiana, Donald, Proc. Mai. Soc, 

 London. 1900, vol. iv., p. 55, No. 1, pi. v., figs. 1 and lc. Type 

 locality — 410 fathoms off Sydney. Hedley, Memoirs Austr. Mus.,. 

 1903, vol. iv., part 6., p. 349, is "not Australian, but probably 

 an Atlantic form"; Hedley and May, Records Austr. Mus., 1908, 

 vol. vii., No. 2, p. 110, in 100 fathoms off Cape Pillar, Tasmania; 

 Gatliff and Gabriel, Proc. Roy. Soc, Victoria, 1909, vol. xxii. 

 (N.S.), part 1, p. 39, San Remo. 



Dredged in 130 fathoms off Cape Jaffa, 1 good ; in 150 

 fathoms off Beachport, 1 ; in 200 fathoms, 1 : in 300 fathoms^ 

 32 good, but all dead. 



Turritella mediolevis, n. sp. PI. xxx., figs. 5 and 6. 



Shell small, elongately-turreted, narrow, of eleven whorls,, 

 including a slightly eccentric protoconch of two convex smooth 

 whorls. The spire-whorls at first are flat and sloping, but 

 later gradually become more convex, until they are quite 

 round. The suture is distinct, subcanaliculate in the earlier 

 part. The ba.se is round. Aperture nearly round, widely 

 effuse in front. Outer lip thin, with a deep central sinus; 

 inner lip thin, rather expanded over a minute perforation. 

 The upper spire-whorls are smooth but for two indistinct 

 bands, one below and one above the suture. In the fifth 

 whorl each of the bands divides into two, and these increase 

 in number in successive whorls, leaving: the central part 

 smooth (whence the specific name) but gradually narrowing, 

 until in the penultimate there are about eight somewhat un- 

 equal low flat spirals encircling the whole surface. In the 

 body-whorl there are about fifteen flat spirals from the suture 

 to the base of the sEell. They are crossed by sinuous axial 

 striae, shaped like the outer lip. Colour white, light-brown at 

 the base and below the suture. 



