SEMIONOTIDiE. 
145 
36883. Head wanting mandibular ramus and facial bones of the 
left side, displaying those of the right side from within. 
The outer teeth are the largest, with a simple obtuse 
apex, and many of the inner teeth are either indented or 
slightly bifid. The vomer exhibits relatively large stout 
teeth, and the outer edges of the pterygoid arcade and 
splenial are similarly armed ; but on the inner face of the 
two latter elements the teeth are merely small tubercles, 
The epihyal is much contracted at its proximal end, and 
the ceratohyal is remarkably short and deep. 
Purchased , 1862. 
P. 1589. Remains of mandible and portions of surrounding bones. 
Egerton Coll. 
Dapedius angulifer (Agassiz). 3 
1832-33. Tetragonolepis trailli, L. Agassiz, Jahrb. 1832, p. 147, 
and Poiss. Foss. vol. ii. pt. i. p. 7. 
1835-36. Tetragonolepis angulifer, L. Agassiz, ibid. p. 213, pi. xxii. 
1854. JEchmodus angulifer , J. Morris, Catal. Brit. Foss. p. 317. 
Type. Nearly complete fish. 
A species attaining a length of about 0*5. Maximum depth of 
trunk not quite equal to its length (exclusive of the caudal fin) and 
somewhat more than three and a half times as great as the depth 
of the caudal pedicle. Marginal teeth unicuspid. Scales of flank 
smooth, none much deeper than broad, and each marked externally 
with a triangular depression of which the base coincides with the 
hinder border while the apex is turned forwards. (Agassiz.) 
Form. 6f Log. Lower Lias :^Stratford-on-Avon, Warwickshire. 
Known only by the unique type specimen, which cannot now be 
traced. /Etc. fb v%r. fern* 0 /*. £ ^ f tf -2— ) 
/£ /cT&*r'i>ur7 &;C o' ^ y 
S' f- / S'& . t- *1 o • - 011 2. ©. 
Dapedius pholidotus, Agassiz. 
1832. Tetragonolepis pholidotus, L. Agassiz, Neues Jahrb. p. 147. 
(?) 1832. Tetragonolepis heteroderma, L. Agassiz, ibid. p. 147. 
1833-44. Tetragonolepis pholidotus, L. Agassiz, Poiss. Foss. vol. ii. pt. i. 
pp. 7, 207, pi. xxiii. e. fig. 2. 
(?) 1833-44. Tetragonolepis heteroderma , L. Agassiz, ibid. pp. 7, 206, 
pi. xxiii. e. fig. 1. [Portion of squamation ; Hartmann Coll.] 
1843. Tetragonolepis pholidotus, F. A. Quenstedt, Flozgeb. Wiirttemb. 
p. 238. 
1852. Dapedius pholidotus, F. A. Quenstedt, Handb. Petrefakt. p. 203, 
pi. xvii. figs. 1, 3-5. 
1854. sEchmodus pholidotus, J. Morris, Catal. Brit. Foss. p. 317. 
PAET III. L 
