ENCHODONTIDiE.. 
213 
T ype. Imperfect fish, wanting tail; Royal Bohemian Museum, 
Prague. 
The type species, attaining a length of about DO. Length of 
lead with opercular apparatus contained approximately three times 
ln khe length from the poetoral arch to the base of the caudal fin. 
Operculum comparatively smooth, its breadth about two thirds as 
great as its maximum depth. Vertebra about 45 in number. 
Form. <J- Loc. Turonian : Bohemia. 
P- 5732. Plaster cast of type specimen ; Jung Koldin, Bohemia. 
Presented by Prof. Anton Fritsch, 1888. 
P- 9002-04. Three imperfect specimens in irregular fragments ; 
Yinary, Bohemia. Purchased, 1899. 
Halec eupterygius (Dixon). 
183/. Osmeroides lewesiensis, L. Agassiz, Poiss. Foss. vol. v. pi. lx b. 
figs. 3, 4 ( errore ). 
(t) 1844. Osmeroides granulatus, L. Agassiz, ibid. vol. v. pt. i. p. 14 
(name only). 
1850. Pomoqnathns eupteruqius, F. Dixon, Geol. Sussex, p. 36/,. 
pl. XXXV. figs. 6, 7. 
1888. Pomognathus eupterygius, A. S. Woodward, Proc. Geol. Assoc, 
vol. x. p. 318. 
Fype. Imperfect fish ; Brighton Museum, 
The type species of the so-called Pomognathus, attaining a length 
ot ab «ut 0-4. Length of head with opercular apparatus much 
exceeding the maximum depth of the trunk, which is probably 
c °ntained about four times in the length from the pectoral arch to 
‘be base of the caudal fin. Length of mandible somewhat exceeding 
,he depth of the head at the occiput; operculum considerably 
deeper than broad ; the infero-posterior spine ot the preoperculum 
B bort, stout, and ornamented with tubercles. The external 
tubercular ornament very* fine, arranged in more or less radiating 
lines on the sides of the cranial roof, the supramaxilla, mandible, 
opercular apparatus, clavicle and supraelaviclo. The stouter rays 
ot the paired and dorsal tins also ornamented with longitudinal 
beries of very fine tubercles. Vertebra about 45 in number. 
The squamation of this species is unknown, probably on account 
of the soft nature of the chalky matrix in which the specimens are 
Preserved. 
Form. Sf Loc. Turonian and Senonian : Kent and Sussex. 
43388. Remains of small fish, in counterpart ; Lower Chalk, Bur- 
ham, Kent. The general proportions are as stated in the 
