400 Mr. A. 8. Woodward on some 
stricted pedicle, and its great lobes are as slender as is usual 
in Caturus ; the short mesial rays are more closely articulated 
and expanded than those of the lobes. ‘The squamation is 
almost completely destroyed ; but there are distinet impres- 
sions of the small rhombic exposed faces of the scales along 
both the dorsal and ventral borders, and behind the anal fin 
there is evidence of the deeply overlapping character of these 
scales. A mass of whitish coprolitic matter in the abdo- 
minal region seems to mark the position of the intestinal 
tract. 
Though thus imperfectly known, the Portlandian fish from 
Garsington is evidently specitically distinct from any Caturus 
hitherto described. The proportions of the trunk and _ fins 
above noted suffice to distinguish it even from the elongated 
species described by Agassiz and Wagner from the Bavarian 
Lithographic Stone. ‘The name of Caturus angustus, proposed 
by Agassiz, may therefore be retained. 
Type. Fish, wanting head ; Worcester Museum. 
- =} . ? . 
Form. and Loc. Portlandian; Garsington, Oxford. 
2. Gyrodus punctatus, Agassiz. 
) 
(Pl XVILL figs. 2-4.) 
1844. Gyrodus punctatus, L. Agassiz, Poiss. Foss, vol. ii. pt. ii. p. 231, 
pl. lxix. a. fig. 24. 
Portions of the dentition of the Pycnodont genus Gyrodus 
are scarcely capable of specific determination; but it is 
probable that when specimens from one formation and locality 
exhibit only small differences from each other they are speci- 
fically identical. For this reason we refer to Gyrodus punc- 
tatus (a species founded on a vomerine dentition from the 
Corellian of Malton) some examples both of the upper and 
lower dentition of Gyrodus now in the Malton Museum. 
When describing the original fossil, which is in the York 
Museum, Agassiz remarked that it might perhaps be referable 
to the same fish as the Kimmeridgian lower jaws named by 
him G. Cuvier? ; but if the Malton fossils now to be described 
are correctly determined, it seems likely that Agassiz’s 
original nomenclature will eventually prove to be justifiable. 
The new fossils comprise a portion of the vomerine den- 
tition (fig. 2), the right and left splenials in association (that 
ot left side shown in fig. 3), a large right splenial dentition 
(tig. 4), and some isolated teeth; and the writer is indebted 
to Mr. Samuel Chadwick, F.G.S., the well-known indefati- 
gable explorer of the Yorkshire oolites, for the privilege of 
cauene the collection. Two of the specimens (figs. 2, 4) 
