A REVISION OF THE AUSTRALIAN TURRINA—HBEDLEY. 285 
Shell small, solid, acicular, contracted at the base, and a little excavate 
below the suture. Whorls eight, three and a half of which form the 
protoconch, of which the apex is produced and the third whorl is keeled. 
Colour faded in my examples, but the oral callosities retain a brown or 
yellow stain. Sculpture:—On the upper whorls are two spirals, and on 
the last eleven, which become closer and smaller anteriorly; the radials 
are stout round-backed ribs. which bulge at the periphery of the upper 
whorls, and are set at seven or eight to a whorl. Aperture :—The mouth 
is triangular, contracted by a bend of the lip; sinus horizontal, spout-like, 
with a © section; columella with two or three small transverse plaits ; 
> 
canal short, a little recurved. Length 4°8 mm., breadth 1-6 mm. 
This has a general resemblance to Glyphostomu trigonostona Hervier,” 
but the Queensland shell is smaller, tapers more sharply to a point, is 
more contracted at the sutures, and has fewer spirals. 
Hub. Queensland :—5 to 8 fathoms, Murray Island (apes 5 to 10 
fathoms, Hope Island (self); 20 fathoms, Darnley Island (Brazier) ; 20 
fathoms, off Endeavour Reef (McCulloch). 
LIENARDIA Joussenume. 
Lienardia Jousseaume, Bull. Soc. Zool. France, ix., 1884, p. 184, type 
Clavatula rubida Hinds. 
Thetidos Hedley, Mem. Austr. Mus., iii., 1899, p. 472, type Thetidos morsura 
Hedley. 
This well marked genus is a characteristic associate of reef corals. 
Typically the shell is brightly coloured. It is ovate, very solid, with stout 
undulating radial ribs crossed by sharp elevated cords. Within the lip 
and on the columella are entering denticules, but the columella denticules 
are more deep seated than in ‘Htrema. The varix has a blunt labial 
margin; it does not extend a thin broad and wing-like expanse towards 
the aperture as with Wtrema. The anal fasciole is traversed by spiral 
threads and is distinguished by the cessation of the radial sculpture, 
which does not intrude on a subsutural space. The sinus inclines to a 
subtubular form. The apex is small, and subulate with one smooth 
helicoid whorl followed by another glossy whorl with a sharp thread keel 
on the shoulder. The apex figured (Plate xlix., fig. 102) is froma specimen 
of L. rubidu taken by myself under a stone at low tide in Milne Bay, 
Papua. 
Under the subgenerie title of Aerista, with L. punctilla Hedley for 
type, I now propose to distinguish a small party of diminutive shells :— 
L. celuta Garrett, disconica Hervier, gaidei Hervier, marchei Jousseaume, 
multinoda Hedley, and semilineatu Garrett, associated by a sculpture of 
compressed beads, trigonal aperture, and lop-sided apex. 
Thetidos may serve for another subordinate group, including species 
with fewer and more massive labial denticules such as L. morswru Hedley, 
for the reception of which Pease” suggested “ Borsoniw.”’ 
76 Hervier—Journ. de Conch., xliv., 1896 (1897), 1 p- 98, pl. iii., fig. 23. 
77 Pease—Proe. Zool. Soc., 1860, p. 1438. : 
