30. 
South Australian Shdls. 
S.A. NAT., VOT., XIV. 
November, 1932. 
17 fathoms. (Type locality — Port Jackson N.S.W., dredged). 
May considered this to be a variety of T, mariae Tenison-Woods. 
T. hofmani is very variable; form (a) is smaller, narrower, thin- 
ner. translucent between the ribs, with a translucent band in 
each spire whorl, and another just above the suture, and about i 
half-a-dozen translucent hair lines; there may be up to three 
narrow brown spirals In the whorls, and a wider one in the base • 
of the body-whorl; the intercostals smooth or faintly spirally 
striate. Form (b) more slender, with eight to twelve well marked ‘ 
spiral incisions at about equal distances, except between the middle I 
two where the space is wider; four to six spiral incisions on the ! 
base; in some the interspaces between the ribs cease abruptly ' 
at the periphery, in others the ribs and interspaces are bounded ' 
just above the suture by a smooth spiral band; rarely this form 
is pink, and some have brown bands. 
T. mariae Te.nison-Woods 1876. “Marie's Turbonilla.” 
Elongated, cylindrical, turreted, somewhat solid; milky-white, , 
opaque; axial ribs, numerous, thick, sloping, rounded interstices : 
small, inconspicuous, as wide as the ribs; ribs on last whorl 
scarcely obsolete at the periphery; whorls twelve, flatly convex; 
base smooth shining, convex; mouth oval, angulated above, pro- 
duced and inverted below. Height 10, diam. 2 mm. Beach, 
Venus Bay, Macdonnell Bay, Robe, rather uncommon. (Type 
locality — King Island, Bass’ Straits). 
T. porteaensis GatlllT & Gabriel 1911. “The Portsea Tur- 
bonilla.” Elongated, solid; milky-whilc; axial ribs, about twenty- 
two on the penultimate whorl, prominent, shining, just project at 
the shoulder and continue to the base, wliere they cross a faint 
t arination, gradually vanishing as they approach the columella; 
interstices deep, as wide as the ribs; spiral striations, close, uni- 
fopm, interstitial, more numerous on body-whorl and base than on 
the spire whorls; protoconch sinistral of two turns; adult whorls 
seven, rounded, slightly shouldered; suture well defined; mouth 
ovate; inner lip slightly reflected. Height 4.5, diam. 1.5 mm. 
Beach — St. Francis Island, Smoky Bay, Venus Bay, Robe, Mac- 
Donnell Bay, uncommon. Also King George Sound, W.A. (Type 
locality — Portsea, Victoria), A graceful form, milky-white colour 
and ornate sculpture. The interstitial striation serves as a use- 
lul recognition mark, and in this respect somewhat recalls Odos- 
to77iia pupaefonnis Sowerby. It is axially costated to the base 
and the suture is not channelled. 
T, varicifera Tate 1898. “The Variced Turbonilla.” El- 
ongate, turreted; chestnut-brown, the varices mottled with white, 
or various shades passing to white occur; axial ribs, close-set. 
