PACHYCORMIOiE. 
395 
P. 6011. A contorted specimen about 1*5 in length, showing the 
paired and caudal fins, noticed in Ann. Mag. Nat. Hist. 
[6] yoI. xiii. 1894, p. 511; Solenhofen. The large trian¬ 
gular lower suborbital exhibits a few radiating fissures or 
grooves in its hinder half, and it seems to have been 
unornamented except at its superior and inferior borders. 
Eight of the characteristic posterior circumorbital plates 
are preserved, each finely rugose or tuberculated in front; 
while between this series and the two great suborbitals, 
there are three other irregular plates. The arrangement 
is shown in the restoration of H. insignis , fig. 40, p. 393. 
The two vomerine teeth are well-preserved. The ossified 
sclerotic is shown in section. 21 rays can be counted in 
the pectoral fins, all divided distally, and the anterior ones 
are finely tuberculated. The scales exhibit the superficial 
granulations most distinctly in the abdominal region, the 
vertical markings best in the caudal region. 
Purchased 1889. 
Hypsocormus leedsi, A. S. Woodward. 
[Plate XI. fig. 1.] 
1889. Hypsocormus leedsi , A. S. Woodward, Geol. Mag. [3] vol. vi. 
p. 450. 
Type. Eemains of skull; British Museum. 
An imperfectly known species about as large as H. macroclon. 
Snout obtusely pointed, the two sides meeting approximately in a 
right angle at its anterior termination, and the external surface 
finely granulated; the large pair of vomerine teeth inclined much 
forwards and apparently projecting out of the mouth. 
Form. Sf Loc. Oxfordian : Huntingdonshire. 
P. 6913. The type specimen, comprising rostrum, portion of splenial, 
the two post-frontals, and other fragments of cranium ; 
Oxford Clay, near Peterborough. The inferior aspect of 
the rostrum (PI. XI. fig. 1) exhibits the basal portion of 
the right vomerine tooth ( v .) and the socket for that of 
the left side; while both of these are shown to be much 
directed forwards and the posterior wall of their socket is 
not ossified. Planking each tooth externally there is a 
triangular area covered with small conical teeth fused 
with the supporting bone, only the apical portion of each 
enamelled; and two of the marginal teeth directly in 
front of the vomerine pair are much larger than the others. 
