28 
Tom ] redale. 
BottrieinlDryon perobesus sp. nov. 
Plato TT., flg. 22. 
One specimen from the month of the Moore River obviously belongs to 
the ‘‘on^loxci” series^ bnt is even more globose than the most inflated typical 
“onslou'i.” Tt is a live shell, and has lh(‘ same style of coloration as the 
onsloici forms, but in the living shell the ground colour is nale yellowish 
green, the longitudinal banding a rich brown. The shell is stout, the spii'e 
very short and somc'what flattened, the body whorl taking up the bulk of the 
shell which consists of four adult whorls and two a|)ical whorls, the latter 
being somewhat strongly tu'oded. The columella is l)road, white, strongly 
reflected, hiding the narrow umbilicus, which, how'evor, still remain.s 0 ]ien. 
Only a, slight subeancellate scupltftre ap]iears below the suture, the she'I 
otherwise being smooth, the growth lines scarcely showing u|). The height 
of the shell is 25 mm. while its breadth is ft) mm. the length of the aperture 
being 15 mm., its bread 8 mm. The annual rainfall is between 15 and 20 
inches. 
Bothriembryon indutus iNtenke 1843. 
Plate TI., fig. 23. 
1842 — BtiUtnus iurlutiis ilenke, Moll. Xov. Roll. Spec., p. 6, Apl. Darling 
Range and Mt. Eliza, West Australia. 
Fig’d. Cox, Alon. Austr. Land Shells, ji. 73, pi. 13, fig. 10, IMay, 1868. 
Piksbry, Man. Conch. (Tryon), Ser. 11., Vol. Xlll., ]). 13, pi. 3, fl.gs. 
o8-Cl, Apl. 23, 1 !)()(). Kobelt, Syst. Conch. Cab. (ilart. & Chemm), 
ed. Kuster, Bd. I., Ab(h X]lI.,' Theil 2, heft CLXVIII., lief. 467, 
p. 783, 1)1. 114, figs. 2, 3, 7, sheet dated 28-Xri.-lfl07. 
1877 — TSulimus ponsonli; Angas, Proc. Zool. Soe. (Loud.,) 1877, p. 70, pi. 
xxvi., fig. 1. M^estern Australia (J. Gould). 
1001 — Vanda '? pon.-^ntihui. Kobelt, Syst. Conch. Cab. (l\Iart. & Chemn.), ed 
Kuster, Hd. L. Abth. XI if., Theil 2, heft CLXVIII., lief, 467, )). 
785, pi. 114, fig, 5, sheet dated 28-VI I.-lflOl. Angas, figure copied. 
Although this species is one of the most distinct it was overlooked for 
some time but is now well known from its form and coloring as well as size. 
Two notable colour variations occixr dull greenish yellow with dark growth 
period stop marks, and reddish bi’own with jiale yellow growth period sto)) 
marks. Apparently these shells stop growth, and the inside of the outer lip 
takes on a dilTereut colouring, and when the shell restarfs, it leaves a very 
distinct coutra.sting recoT’d of the stoppage. The shell is very elongate, 
stout, regularly narrowed about twice as long as broad, and while the colum- 
ella is twisted a slight umbilical chink is present, the spire about equalling 
the aperture in length. The ajiex is imnctate but usually eroded, and no 
varix can be seen, the adult whorls show a faint nodulose retieulatioji on 
upper whorls, the last wdiorl only with obscure growth marks. 
The specimen figured is fi'om King's Park, Perth, and measures 40 mm. 
in length by 19 mm. in breadth, wdiile smaller ones measure 34 mm. by 16 
mm. The dead shells are white as the coloration lies in the rather thick 
periostracum which clothes the shell. 
ITedley (Proc. Malac. Soc. (Lond.), Vol. T, ]i. 260, 1895), wrote: “Judg- 
ing from the figure of VuHwas PonsouJiii. and from the travels of its col- 
lectoi’, I am disposed to deny that it is a Liparus, or that it comes from 
Western Australia, but hold it rather to be a variety of Vanda atomata col- 
lected in Xew South Wales.” There is now little doubt that Gilbert collected 
the specimens in the neighbourhood of Perth, and that the name is an abso- 
lute synonym of indatus. 
