JOG 
are not in the Specimens, although they are hollow, and 
to all appearance perfect. 
Found with the last in decomposed Limestone, from 
the general wreck of which they have escaped by being 
composed of silex. 
SPIRIFER^Walcottu 
TAB. CCCLXXVII.—Fig. 2. 
Spec. Char. Suborbicular, gibbose with one 
large, rounded, elevated fold in the middle, 
and four smaller ones on each side. 
Beak pointed, incurved, the hinge line is shorter than 
the width of the shell ; both valves are equally gibbose 
and smooth, the smaller one is shorter than wide ; the 
area between the beaks is rather rounded, but furnished 
with a triangular foramen. 
Found many years ago by Walcott, at Camerton, 
about six miles and a half from Bath, on the road to 
Wells, and represented by him in his work upon the 
Petrifactions found near Bath 9 figs. 33. Walcott observes 
of similar shells, u that those found on the upper Bristol 
road near Bath, are smaller ; their shell thin ; white ; 
a triangular hole between the beak of the lower valve, 
and the hinge ; and have the body fig. 33. A. B. within 
them ; it consists of two hollow cones joined to each 
other by part of their base and to one of the valves, but 
not so close as to prevent the animal, or part of it, from 
retreating into them : the surfaces of them are beautifully 
covered with circular rows of small pyramids of spar.” 
Thus it appears that he was the discoverer of the spiral 
appendages long before they were used as a generic 
character, although he did not clearly see their spiral 
form : he also observed the triangular foramen, and it is 
much to be regretted that he did not figure the shells as 
well as tlieir contents, as they probably were a different 
species from the one before us. 
The 3 upper iigures are from a specimen in M. de la 
Beebe’s cabinet found in the Lias of Keynsham ; the 
other two were given me by the Rev. Robert Plumtree, 
who collected them at Pyrton Passage, near Berkley,, 
Gloucestershire ; they are rather compressed. 
