240 FOSSIL FISHES OF THE ENGLISH CHALK. 



Hoplopteryx, Agassiz (p. 13). 



In Ann. Mag. Nat. Hist. [8] vol. vii (1911), p. 5, pi. i, Mr. C. Tate Regan has 

 pointed out that three known species of Berycoids existing in the seas off South 

 Australia and New Zealand are referable to Hoplopteryx. He publishes a figure 

 of the Australian II. affinis. 



Hoplopteryx superbus (Dixon) (p. 20). 



The group of specimens in a block of chalk shown in PI. V is noticed and 

 figured in a newspaper, " The Illustrated Times," 24th November, 185-5, p. 405. 

 It is stated to have been obtained from the neighbourhood of Rochester, Kent. 



Hoplopteryx simus, A. S. Woodward (p. 23). 



Dr. Arthur W. Rowe has obtained a specimen of this species from the base of 

 the zone of Micraster cor-testadinorium at Dover. 



Apateodus striatus, A. S. Woodward (p. 38). Plate LIV, fig. 4. 



A nearly complete large skull and mandible of this species, recently acquired 

 by the Museum of Practical Geology, confirms the published description in 

 several respects and makes some additions to our knowledge of the osteology of 

 Apateodus. The occipital region of the cranium, especially, is more clearly shown 

 ban in the specimens previously studied. The greater portion of the cranial roof 

 (PI. LIY, fig. 4^) is formed by the frontal bones (/>'.), which expand above the 

 orbits into large supraorbital flanges, and taper forwards to overlap, in an uncertain 

 degree, the attenuated and bluntly pointed mesethinoid (eth.). They are without 

 ornament even on their radiating ridges. Behind the left frontal, the small 

 parietal ([><<.) is sufficiently well preserved to show that it meets its fellow in the 

 median line in a wavy suture ; and this pair of bones is clearly crossed at the 

 hinder margin by a transverse slime-canal. Posterior to the parietals the occipital 

 border evidently consists of the supraoccipital bone (soce.) flanked by the pair of 

 epiotics (< J po.), and must have been covered by a forward extension of the body- 

 muscles. The supraoccipital bears a large posterior crest, which does not rise 

 above the plane of the flattened cranial roof ; but its anterior portion does not 

 appear to extend forwards beneath the parietals to the frontals, and it seems 

 likely that the bone interpreted as supraoccipital in the small skull already 

 described (p. 39, PI. XT, fig. 16) is really the left parietal displaced by crushing. 

 A fragment of the ossified sclerotic (PI. LIV, fig. 4, scl.) is seen in the orbit ; 



