205 



Dentalium cheverti, Sharp and Pilsbry. 



Dcntalium cheverti, nom. mut., Sharp and Pilsbry, Tryon, 

 Man. Conch., 1897-8, vol. xvii., p. 9; Redley, Records Austr. 

 Mus., 1901, vol. iv., No. 3, p. 129, pi. xvii., fig. 34; Bossevain, 

 Scaphopoda, Siboga Exped., 1906, p. 17. 



Dentalium septem.costatum, Brazier, Proc. Linn. Soc, 

 N.S.W., 1877, vol. ii., p. 57 (nom D. septemcostatum, Abich, 

 1859). Type locality — Evan Bay, Cape York, North Australia,. 

 6 fathoms, sand (Chevert Exped.). 



Dredged in 22 fathoms in Gulf St. Vincent, 2 in good 

 condition, 13 mm. long. 



Dentalium katowense, Brazier 



Dentalium katowense, Brazier, Proc. Linn. Soc, N.S.W., 

 1877, vol. ii., p. 56. Type locality — Katow, New Guinea, 8 

 fathoms, sandy mud and coral; Pilsbry and Sharp, Tryon, 

 Man. Conch., 1897-8, vol. xvii., p. 9; Hedley, Records Austr. 

 Mus., 1901, vol. iv., No. 3, p. 129, pi. xvii., fig. 33; Bossevain, 

 Scaphopoda, Siboga Exped., 1906, p. 16. 



Dredged in 15 to 22 fathoms in Gulf St. Vincent, 4 in 

 good condition. The longest is 22'5 mm. Mr. Hedley writes : 

 "This answers fairly to my specimens from the Gulf of Car- 

 pentaria." 



Brazier in the definition of his species writes, "interstices 

 with minute lengthened striae." If the specimens of D. 

 inter calatum, Gld., from South Australia are carefully exam- 

 ined under a lens when their larger end is toward the light 

 they will show their transverse accremental striae very plainly, 

 but when they lie with their side toward the light these are 

 quite indistinct, and fine axial striae are visible. The rela- 

 tive validity of these axial and concentric striae varies in 

 different examples. They are to be seen in my specimens 

 labelled D. katowense. 



Dentalium thetidis, Hedley. 



Dentalium thetidis. Hedley, Memoirs Austr. Mus., 1903, vol. 

 iv., p. 327, fig. 61. Type locality— "In 63-75 fathoms off Port 

 Kembla; also in 41-50 fathoms off Cape Three Points." 



Dredged in 6 fathoms off Black Point, Gulf St. Vincent, 

 1 fresh ; in 15 to 22 fathoms Gulf St. Vincent, 2 good ; in 

 130 fathoms off Cape Jaffa, 2 fresh, 7 dead ; in 300 fathoms 

 off Cape Jaffa, 3 dead. Identified by cotypes from Mr. Hed- 

 ley. In the two fresh specimens from 130 fathoms, close to 

 the posterior end, in the furrow on each side next to the 

 central furrow on the convex surface, are four minute holes 

 in an axial line. These are probably only accidental. They 

 may be the boreholes of predacious molluscs. Still it is a 

 curious coincidence to find them in two specimens, in iden- 

 tically the same position ; and the coincidence is more striking 



