450 A. 8. Woodward—British Jurassic Fishes. 
2. Strobilodus suchoides, Owen, sp. 
An examination of the type-specimen of Strobilodus giganteus, 
Wagner,’ in the Munich Museum, has convinced the present writer 
of its generic identity with the so-called Thlattodus suchoides, Owen,? 
as already suggested with hesitation by v. Zittel (loc. cit. p. 229). 
One more Bavarian type is thus added to the fish-fauna of the 
English Kimmeridge Clay ; and, as will shortly be pointed out else- 
where, there is evidence of still another British species of the same 
genus ranging as far upwards as the Purbeck Beds (Brit. Mus. 
46,911). 
3. Hypsocormus Leedsi, sp. nov. 
The genus Hypsocormus was founded by Wagner in 1863,? and, 
as remarked by v. Zittel, only two species are yet recognized, these 
being apparently confined to the Bavarian Lithographic Stone. 
Characteristic portions of the jaws of two other species, however, 
have been discovered in the Oxford Clay of Peterborough, by Mr. 
Alfred N. Leeds, of Eyebury, who has kindly entrusted them to the 
present writer for elucidation; and although the dentition of the 
genus has not hitherto been described in detail, the recent acquisition 
by the British Museum of a fine example of Hypsocormus macrodon 
from Solenhofen, renders a direct comparison of actual specimens 
possible. 
The larger species from Peterborough, which may be appropriately 
named H. Leedsi, is represented by the anterior extremity of the 
snout associated with two fragments of the skull (No. 39, Leeds 
Coll.), indicating as large a fish as H. macrodon. The snout is 
obviously a compound bone, but the discussion of the homologies 
of its parts may be deferred. As in the Solenhofen species just 
mentioned, it is obtusely pointed, the two sides meeting approximately 
in a right angle at its anterior termination ; and the external surface 
is finely granulated. As in H. macrodon, also, there is a pair of 
large tusk-like teeth, rounded in section, arising from sockets in the 
middle of the bone; but, whereas in the species just referred to, 
these ‘‘ tusks” are directed vertically downwards, in H. Leeds they 
are much inclined forwards, and, if perfect, would doubtless project 
beyond the front of the supporting bone. An irregular cluster of 
small, stout, conical teeth occurs on each side of the central pair, and 
two of these outer teeth, larger than the others, are placed directly 
in front. 
The abraded anterior extremity of a large right mandibular ramus 
of Hypsocormus in Mr. Leeds’ collection (No. 388) also probably 
pertains to H. Leedsi, corresponding to the above-described snout in 
size ; and this fossil is interesting as exhibiting the form and pro- 
portions of the splenial element. The dentary constitutes the outer 
1 A. Wagner, ‘‘ Beitr. Kennt. lith. Schief. Fische,’’ Abh. k. bay. Akad. Wiss., cl. 
ii. vol. vi. (1851), p. 75, pl. i. 
* R. Owen, ‘‘ On a Genus and Species of Sauroid Fish (Zhlattodus suchoides, Ow ) 
from the Kimmeridge Clay of Norfolk,’? Grou. Mac. Vol. III. (1866), pp. 55-57, 
Tels JOO 3 A. Wagner, doc. cit. (1863), p. 677. 
