129 
ORTHOCERA striata. 
TAB. LVIII. 
ne 
Spre. Cuar. Shell tapering very gradually, lon- 
gitudinally striated, thin; aperture oval, about 
one-third broader than wide; septa numerous, 
deep. 
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Tue stone filling the last chamber of this specimen, if 
separated would form a cup about three inches and an half 
in the longest diameter, and a little more than two in the 
other, an inch deep, and about three-eighths thick in the 
middle, with a very thin edge. The septa are extremely 
thin, blending almost imperceptibly with the outer shell. 
The siphunculus is about a quarter of an inch wide, and 
the whole of the specimen I possess is eleven inches long. 
This species is in a lightish coloured Limestone found 
in the Black rock near Cork, and was sent me by 
Dr. Wood and Mr. Wright, in 1812, who observe that 
there are much larger in other parts of Ireland. I have 
two cupped Limestone divisions of a species much related 
to it from the Kendal Limestone, with Encrini and a small 
Trilobite imbedded in them, with the siphuncle central, 
but thicker in proportion to the diameter; they are five 
inches by four in diameter, and taper so little that a series 
would be fourteen or sixteen feet long ere they. would form 
a pointed end. We hope this will inspire the curious in 
these researches to trace these subjects in the rocks ere they 
detach pieces. 
