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PALAEONTOLOGY OF NEW YORK. 
conditions of the shell. The striee towards the base of the shell are so closely 
crowded that fragments of this part, when compared with the portions of the 
surface towards the summit, might be mistaken for a distinct species. 
Portions of two individuals from the same locality preserve similar features; 
but other specimens are required for a full determination of the distinctive 
characters. The length of the portion preserved in the specimen figured is 
about 11 centimetres. 
Formation and locality. The only specimens of this species yet recognized are 
in a calcareous shale, in the higher beds of the Hamilton group, upon the east 
shore of Cayuga lake, N. Y. 
CONULARIA CONTINENS. 
PLATE XXXIII, FIG, G,':PLATE XXXIV, FIGS. 3, 4, 6 ; AND PLATE XXXIV A, FIG. 6. 
Conularia continens, Hall. Illustrations of Devonian Fossils:' Pteropoda, plate 28, tigs. 4-6. 1876. 
Form regularly pyramidal, with the sides gently sloping from the apex, and 
the angles a little projecting. Transverse section rectangular, with the 
sides equal or subequal, and usually slightly concave in the middle, 
convex towards the margins, and abruptly inflected into the furrow at the 
angles. Faces of the pyramid equal,, and without a distinct groove or 
depression along the centre, which, however, is marked by an interruption 
of the strise. Angles marked by a narrow, distinctly rounded furrow, into 
which the surface-markings are extended. Aperture unknown; the 
summit has been truncated by a septum. 
Surface marked by regular and abruptly elevated, transverse striae, which curve 
gently forward, and along the mesial line are interruptedly alternating and 
interlocking with each other, the extremities gradually dying out in the 
interstriate spaces; in some places the striae appear as if abruptly bent 
forward, without alternation, along the middle. These striae are distant 
from each other about three times their own width, and their crests are 
ornamented by regularly arranged minute pustules, from which, on the 
lower side, extend very slender ridges, reaching one-third or one-half 
