317 
Mangilia alucinans, Sowerby, Proc, Mal. Soc., London, 1896, 
vol, il., p. 29, pl. iii., fig. 12. Vype locality—Vankalilla Bay’’ : 
var. ornata, Sowerby, loc. cit., pl. iii., fig. 18; Pritchard and 
Gatliff, op. cit. supra, p. 175, ‘‘Victorian coast’’; Tate and May, 
loc, cit. supra, “Long Bay, Tasmania.’’ 
Mr. Sowerby says of M. alucinans:—“Shells of this 
species have been mistaken for IM. vincentina, Crosse, and 
also for J/. lineata, Reeve. The type of the former is a little 
plain brown shell, with very obscure bands of darker brown. 
It is more sharply angular, and the ribs are thinner than 
in M. alucinans.” 
Mr. Angas in P.Z.S., 1877, p. 185, records M/. vincen- 
tina tor New South Wales, and remarks: —‘“The figure given 
in the French Journal of this species is so bad, no one could 
recognize it. The shell is white, with a row of brown spots 
between the ribs a little below the sutures, and sometimes 
with a central band on the last whorl. Crosse figures it of 
a uniform brown colour.” ‘This figure seems to have ex- 
cusably misled Mr. Sowerby as to the appearance of Crosse’s 
type, and he calls it “a little plain brown shell.” Crosse 
describes his shell as “lutescens,” and Sowerby his as ‘“‘stram- 
inea,”” both equal to “yellowish”; Angas says the former is 
white, and Sowerby says of the latter, “Some are nearly 
white.” As to /. vincentina being a little shell, it is really 
described as 7 mm. long, which is half a millimetre longer 
than M7. alucinans. Angas recognized Port Jackson shells 
as the species he had sent to Crosse from South Australia, 
and examples sent me from New South Wales by Mr. Hedley 
as M. vincentina are identical with the type and cotypes of 
M. alucinans returned to me by Mr. Sowerby. The type 
localities of the two species are practically the same, Rapid 
Bay and Yankalilla Bay being adjacent to each other in 
Gulf St. Vincent ; and it is significant, too, that Mr. Sowerby 
says, “Among all the South Australian shells I have exam- 
ined, none are quite conformable to Crosse’s type of this 
species,” and yet Angas and I dredged our specimens in 
almost the same spot. ou ve 
In the collection of the late Professor Tate, which came 
into my possession, was a tray with rather more than 200 
shells labelled Mangelia vincentina, St. Vincent Gulf. Of 
these nearly one-half were like Sowerby’s type of Jf. aluci- 
nans, and the remainder were the stouter, more coloured 
form approaching his variety ornata. Angas in P.Z.S., 
London, 1880, p. 415, begins a paper thus :—‘‘Several months 
ago I received from Professor Ralph Tate, of the Adelaide 
University, a small collection of marine shells obtained by 
him (mostly from shell-sand) on various beaches in St. Vin- 
