233 
AMMONITES Brocchii. 
TAB. CCIL 
Spec. Char. Compressed; sides hollow, radiated; 
inner whorls half concealed; front circular, 
with many obtuse ridges ; aperture lunate. 
V olutions three or four, very round ; twenty radii ex - 
tend nearly half over them, the rest of their surface is 
covered by nearly six times as many obtuse, arched, not 
very prominent ridges. Were the hollow sides consi- 
dered as umbilicate, the umbilicus would be conical but 
would have no defined edge ; the aperture is lunate, in- 
clining to transversely elliptical. Thickness half the dia- 
meter. The septa are remarkably numerous, and finely 
sinuated. 
From the same friend, and probably from the same 
place, although of a greyer colour, as A. Banksii, I 
received the large specimen; it seems to have been ex- 
posed to the weather. 
The small specimen is from Dundry, by favour of 
G. W. Braikenridge, Esq. 
The name is to commemorate the author of a recent 
valuable work upon the fossil shells of his own country. 
