229 
Mr. Petterd to the Launceston Museum, and a label -/osephia 
Tasmanica, in his handwriting, was found in the same box with- 
out any shells attached. Mr. Petterd, to whom she referred 
them, says he believes these shells are the co-types of Wood’s 
species, which was described from shells in Mr. Petterd’s posses- 
sion. There is, therefore, no doubt about the identity. As to 
its generic location: Woods created the subgenus Josepha for it 
under Cominella, because of its columellar plait, but Tryon says, 
“Tf it is really distinct from Cominella, why is it not a Phos?” 
Man. of Conch., Vol. 3, p. 207. I know of no reason why it 
should not be regarded as a Phos. Its dentition, given on pl. 
vill., fig. 6, is identical with that of the genus Phos given in 
Tryon’s Man. Vol. 3, pl. 27, fig. 35. Its shape approximates that 
of Phos virgatus, Hinds, op. cit., pl. 83, fig. 502, and it has a 
columellar plication. This varies in validity in different examples, 
but is always present, and is not merely a projection of the varix 
of the notch through a thin layer of columella callus. For this 
callus at its margin may be quite devoid of a plication, which is 
yet distinct enough a little further within the aperture, where it 
may show two, three, or four ridges which have been subsequently 
laid down. I have, therefore, placed it in the genus Phos, and 
discarded the subgenus Josepha. 
Myodora corrugata, spec. nov. PI. viii., figs. 1, la, 1b. 
Shell transversely ovate, thin, subequilateral, inequivalve 
Umbos apposed, acute, retroflexed. Anterior dorsal margin 
uniformly slightly convex. Posterior dorsal margin uniformly 
slightly concave; the two forming an angle of about 130°. 
Ventral margin slightly convex, anteriorly rising rapidly to form 
a well-rounded curve with the front dorsa] margin; posteriorly 
forming a marked angle, slightly more than a right angle, with 
the truncated posterior extremity; in large specimens the ventral 
margin is slightly concave in front of this angle. Posterior ex- 
tremity almost vertically straightly truncated, the end sloping 
slightly downwards and forwards, making a right angle with the 
post-dorsal margin. Right valve convex, well-marked ridge from 
umbo to postero-inferior angle; sculptured with very distinct, 
regular, concentric ribs, about one-half the width of the inter- 
spaces, and as high as wide, smooth and rounded, continuous 
from one dorsal margin to the other. Left valve a little smaller 
than the right, almost flat, very slightly rounded transversely, an 
indistinct ridge from umbo to postero-inferior angle, behind 
which the surface is quite flat ; sculpture like that of the right 
“valve, but not quite so deep, especially behind the umbonal ridge. 
There is a long narrow post-umbonal area on the dorsal hinge- 
line, smooth, slightly excavated, the right valve composing rather 
