602 Transactions 
Several additional features are better shown by other fragments. On 
two the form of the aperture can be made out, though it is not quite 
complete in any specimen. Tt i is oval in gm and appears to be quite 
holostome, with no trace of a sinuosity (fig. d) 
Several specimens have been sectioned, and these show that the 
columella is solid, and oblique to the axis of the shell, although the degree 
of obliquity varies somewhat in different individuals (fig. c б). 
if 
p 
L/ 
A yl aie 
T 
UL Р 5 
Katosira obliquestriata n Sp. a, holot b, Desc 
- Sp. otype ; cimen vedi em 
whorls; с, бн of а shell to show ренту d, as 
showing form of aperture ( pem restored); e, f, diagram of филе 
ation on upper whorls (f, а ype). 
One specimen, ial giri rine only by a single whorl, indicates that ye 
species attained a much larger "s than is shown by the holotype ; 
length may have ae more than 60 mm. 
Some smaller fragments show the earlier whorls, Two such are shown 
in figs. e and Er the latter will be taken ав a rupe The enn 
which are most pronou nced near posters 
border, and which are sharply inclined across whorl. On succeeding whor 
ar met is of the same character, but — are not Li as ps 
widely spaced, while spirals are num 
lates (т fifth). whorl costae are replaced by low “folds or noie and 
