PACE: ON BUCCINUM DERMESTOIDEUN, LAMK. 255 
1889. ‘ C. [ Columbella| lineolata, Pearse [sic]”: T. Whitelegge, 
Invert. Fauna Port Jackson, p. 90, sp. 306 [no fig. ]. 
1893. ‘* Columbella lineolata, Pease, = C. dermestoides, Ang., non 
Kien.”?: D. J. Adcock, Aquat. Moll. South Austral., sp. 115 
name only |. 
1895. ‘* Columbella (Mitrella) lineolata, Brazier”: W. Kobelt, in 
Martini & Chemnitz, Conch. Cab., Columbella, p. 214, 
pl. xxix, fig. 12 [ merely copies Tryon ]. 
1896. ‘‘ Columbella (Mitrella) dermestoidea, Kiener”’: W. Kobelt, in 
Martini & Chemnitz, Conch. Cab., Columbella, p. 234, 
1, xxxuj, fig. 1 [copies Kiener ]. 
1901, Dec. 19. ‘ C. [ Columbella| lineolata, Brazier”: R. Tate and 
W.L. May, Proc. Linn. Soc. New South Wales, 1901, p. 366 
[name only }. 
—. Columbella lineolata: W.H. Pease, MS. 
——. Columbella maculata: W. H. Pease, MS. 
Columbella tessellata: J. S. Gaskoin, MS. 
Since the publication of Sowerby’s Columbella monograph, authors, 
while differing widely as to the specific name of the Australian shell, 
have all agreed that it should be classed among the Columbellide ; 
although by several it has been referred to Adams’ genus Amyela, 
which, strictly speaking, is Nassoid and not Columbelloid in its affinities. 
Upon pureiy conchological grounds this association of Buccinum 
dermestoideum with the Columbellide was fully justified, since the 
shell presents no characters of more than specific importance by which 
it can be separated from species which are beyond question true 
members of that family, and nothing has hitherto been known 
regarding the internal anatomy of this form. Recently, however, 
the examination of the dried-up remains of several animals which 
I have been enabled to soak out of shells in my own collection ! 
has proved conclusively that the species must be removed from the 
Columbellide ; and, since it is not possible to assign it to any 
established genus, I am proposing for its reception the new genus 
PsEUDAMYCLA. 
PsEUDAMYCLA DERMESTOIDEA (Lam.). 
Shell and Operculum.—The shell of this species is too well known to 
require detailed description : it is readily recognized among Australian 
Prosobranchs by its Amycleform contour, and its smooth or spirally 
striated whorls with their prettily tessellated marking. The protoconch 
(Figs. 1-3) is not sharply differentiated from the nepionic shell: its 
whorls are smooth and devoid of marking. The periostracum is thin 
and adherent, transparent and of a somewhat greenish tinge. The 
operculum (Figs. 4 and 5) pale-horn coloured, rounded and with apical 
or sub-apical nucleus. 
External characters of Animal.—It is not yet possible to say very 
much regarding the external characters of the animal of Pseudamycla 
1 These ‘were collected in Sydney Harbour. 
