124 



two whorls a fifth small cord appears above^the suture. The 

 base is flatly rounded, with five flat low spiral cords. The 

 aperture is squarely round, slightly effuse near the columella, 

 which is curved ; inner lip, a broad glaze ; outer lip simple, 

 smooth inside, corrugated outside by the spirals, with a deep 

 broad sinus well rounded at its depth between the two smaller- 

 cords; growth lines corresponding in outline with the outer 

 lip constitute the only other sculpture. It has a pale-yellow- 

 brown tint, with darker brown spirals between the cords, and 

 a broad brownish spiral over the middle of the base. 



Dim. — Length, 17 mm.; breadth, 6 mm. 



Locality. — Type in 110 fathoms off Beachport, with 11 

 others good: in 150 fathoms, 8 poor: in 130 fathoms off Cape 

 Jaffa, 9 good. 



It may reach 22*5 mm. in length. The suprasutural and 

 infrasutural cords may each split in the later whorls at its upper 

 part to form a small secondary spiral. 



Diagnosis. — Its alliance is with T. australis, Lam., from 

 which, however, it differs in its more numerous and non- 

 tuberculate spirals: from the Tasmanian variant, T. granu- 

 lifera, Tenison- Woods, it differs in the absence of nodulation, 

 and the relative disposition of the ribs, and of numerous spiral 

 threadlets. It is of interest to note that neither of these 

 forms is found in South Australian waters, though taken at 

 Western Port, Victoria, and in Tasmania abundantly. 



Type in my collection. 



Turritella atkinsoni, Tate and May. 



Turritella tasmanica, Tenison- Woods (non Reeve), Proc. Roy. 

 Soc, Tasmania, 1877 (1876), p. 140. Type locality — Long Bay, 

 Tasmania. 



Turritella atkinsoni, Tate and May (nom. mut.j. Trans. Roy. 

 Soc, South Australia, 1900, p. 95; also Proc. Linn. Soc, New 

 South Wales, 1901, vol. xxvi., part 3, p. 378, pi. xxiii., figs. 15, 

 16, and 17; Gatliff and Gabriel, Proc. Roy. Soc, Victoria, 1909, 

 vol. xxii. (N.S.), part 1, p. 38, Bass Strait. 



Var. Turritella godeffroyana, Donald, Proc. Mai. Soc, Lon- 

 don, 1900, vol. iv., p. 53, No. 3, pi. v., figs. 6 and 6a. Type 

 locality — Bass Strait. Tate and May regard this shell, which 

 Miss Donald described as a new species, as a variety of Tenison- 

 Woods' species: and Hedley, in Memoirs Aust. Mus., 1903, vol. 

 iv., part 6, p. 349, points out that her name has some months' 

 priority over that of Tate and May. 



Dredged in 90 fathoms off Cape Jaffa, 1 ; in 110 fathoms 

 off Beachport, 2 : in 130 fathoms off Cape Jaffa, 2 : in 150 

 fathoms off Beachport, 15 good up to 16 mm. in length; in 

 200 fathoms off Beachport, 2 good. 



