212 
ACT1N0PTERYGII. 
Genus HALEC, Agassiz. 
[Verhandl. Ges. raterl. Mus. Bohmen, 183-1, p. 67.] 
Syn. Pomognathus, F. Dixon, Geol. Sussex, 1860, p. 367. 
Arcbeeogadus, W. von der Marclc, Palieontogr. vol. xv. 1868, p- 
Phylactocepha'us, J. W. Davis, Trans. Hoy. Dublin Soc. L I 
vol. iii. 1887, p. 605. 
Trunk deeply fusiform, both this and the head laterally com 
pressed. Cranial roof exhibiting a median longitudinal depress ^ 
its lateral and occipital margins ornamented, like the other ester 
bones, with ridges and tubercles of ganoine. Mandible a 1 ^ 
prominent, with several rows of recurved conical teeth, irregular ^ 
size and arrangement; promaxilla long and slender, with tw 
more rows of minute teeth ; maxilla long and slender, underla{ I 
by the premaxilla for the greater part of its length, but en ^? r e 
the gape behind, where it bears a spaced series of relatively 
conical teeth pointing forwards; a conspicuous supramaxilla P rese ^ 
the comparatively stout palatine and ectopterygoid bones ^ ean[ ^ t 
close series of acute, laterally-compressed teeth, whicn are 8 ^ 
in the middle and diminish towards each extremity' ; n0 
barbed. Preoperculuin very narrow and deep, with a oonspi 
posteriorly-directed spine at its lower end ; operculum strong 
on the inner side by a ridge extending almost horizontally ^ 
wards to its postero-inferior angle ; hranchiostegal rays about ^ ^ 
number. Vertebra; from 35 to 45 in number, the centra at 
long as deep, much constricted mesially r and somewhat stren^^^ 
with small longitudinal ridges. Fin-ray r s robust and all a 1CU 
mostly also subdivided distally ; no fin-rays excessively < o ^ ^ 
Paired fins large, the pelvic pair not much smaller t 
pectorals; the short dorsal fin within the anterior half of t ® ^ 
anal fin relatively small and remote ; caudal fin deeply for eaC j 1 
regular squamation of very small scales, the exposed area 
quadrangular in shape ; no enlarged scutes. 
Halec sternbergi, Agassiz. ^ 
1834. Halec sternbergii, L. Agassiz, Verhandl. Ges. vate 
Bohmen, p. 67. - p , 123, 
1844. Halec sternbergii, L. Agassiz, Poiss. Foss. vol. v. P 
, Phlxiii. Kreideform- 
1845-46. Halec sternbergii , A. E. Reuss, Verstein. bohm. 
*• y. xo, pi. li. p. no, pis. xxu., x 
1878. Halec sternbergii, A. Fritseh, Rept. 
t>. 37. iv 
1883. 
u. Fische bohm. 
p. 37, pi. ix. 
i. Halec sternbergii, A. Fritscb, Archiv naturw. 
Bohmen, vol. v. no. 2, p. 89, fig. 47. 
Dan 
idesdur 
