78 
MEMOIRS OF TIIE QUEENSLAND MUSLI M. 
Sci vol iii p 290 1892), Pilsbry (Proc. Acad. Nat. Sci. Philad., 1901, p. 392),. 
Cos— (Eli Paleoconch . comp. live 7. pp. 66-84 1906, Dali. (Proc. Acad. 
Nat. Sci. Philad, vol. 59, p. 363, 1907), and Winckworth (Proc Mai. Soc. 
(Lond.), vol. xviii, p. 228, 1929). These results may be written thus : 
Type by Montfort, 1810 : Cerithium vertagus 
Linne. 
Type here named Cerithium adansonii Bruguiere.. 
Not Australian. 
Cerithium Bruguiere 
Aluco Link 
Contumax Hedley . . 
Pseudovertagus Vignal 
Type, C. decollata = C. nodulosum Bruguiere. 
Type, Mur ex aluco Linne. 
Many further subdivisions will be discussed later. 
Pseudovertagus excelsior sp. nov. 
(Plato IX, fig. 17.) 
An elegant Cerithioid nearest C. sowerbyi Kiener, which I have renamed 
C. phylarchus, but more subulate. 
Shell awl-shaped, tapering rapidly, earlier whorls clathrately sculptured, 
later whorls smooth, columella not plaited, canal very much recurved. Colour 
greenish white marked with more or less regular squarish purple-brown spots, 
the ground colour appearing as spiral lines, the darker as irregular radial marks. 
The last whorl shows a semi-absorbed varix at the third, but no previous 
varices are to be seen ; basally fine grooving, to the number of four, surrounds 
the whorl but these can scarcely be seen on the penultimate, and on the 
penultimate the intervening spaces appear more as elevated scarcely nodulous 
ridges. Normally the adult is truncate, about twelve adult whorls being 
counted ; the earliest of these shows a very distinct radial ribbing of about 
ten to twelve ribs overrun with close threads very different from the later 
whorls. The suture is linear but threadlike and distinct. The mouth is obliquely 
oval, the outer lip circular, heavy, thickened, subvaricose, the columella not 
plaited, inner lip as a heavy glaze extending across the body whorl to the 
outer lip where just inside there is a prominent notch and entering ridge. The 
canal is long but bent back at right angles and narrow, no umbilical chink 
being present. 
Length 74 mm. ; breadth 21 mm. 
Habitat : North Queensland. Type dredged in 11 fathoms, Michaelmas 
Cay. 
A correction may be here added as in my last notes I proposed 
Cerithium probleema for Cerithium lemniscatum Quoy & Gaimard, and I find 
that Cossmann (Essais Paleoconch. comp. livr. 7, July 1906, p. 123, footnote) 
had made the alteration, providing Cerithium philippinense, a correction not 
recorded in the Zoological Record. 
