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the teeth of the Squalus stellaris are also long, and pointed with a small 
point on each side, at the base, like the last figured tooth. In the 
Squalus nasus are similar teeth, but not so numerous as in & stellaris. 
Triangular teeth, with three points, are the Glossopetrce tricuspidce 
Iceves, tridentulce, Luidii. Teeth of this figure are found in the Isle 
of Shepey, and are generally of a dark colour, from ferruginous im- 
pregnation, Plate XIX. Fig. 5. Teeth of this figure are sometimes, 
but very rarely found, with their surfaces covered with close longitudinal 
striae, and bearing a very high polish. The specimen, Plate XIX. 
Fig. 10, is a magnified representation of one of these, trom a mass in 
which are several other teeth, which, though varying considerably in 
their form, are all evidently of the same fish, and all have similar 
markings. This mass was found at the Old Passage, Gloucestershire, 
by Mr. Johnson, of Bristol, who has a beautiful mass of similar teeth, 
but of a larger size, which he obtained from Charmouth. 
In the Squalus squatina the teeth are simply pointed, with a broad 
base, but with no lateral points ; somewhat resembling Plate XIX. 
Fig. 9. In the Squalus maximus and glaucus the teeth have a sharp 
cutting edge only, agreeing nearly with Plate XIX. Fig. 2. 
Spallanzani speaks of the very singular dentature of two jaws similar 
to that of the Squalus of Messina, which, he thinks, has not been yet 
described. These jaws were brought, with a number of exotic fishes, 
from Holland, and appear to have belonged to a very large Squalus, 
but of a species hitherto unknown ; at least, he says, he does not find 
teeth of a similar structure described by any writer. The opening of 
the jaws is full three feet and a half in circuit, and consequently 
large enough to receive a man of middling size lengthwise*. 
The figures of these teeth, as given by Spallanzani, exactly agree 
with those which are given by Scilla, as belonging to the kind of dog- 
fish, which have obtained, in the Mediterranean, the name of Colom- 
* Travels in the Two Sicilies, Vol. iv. p. 370. 
VOL. III. 
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