CRYPHIOLEPIS STRIATUS. 



105 



similar in character to those of the maxilla, but running obliquely upwards and forwards 

 so as to cut the upper margin of the bone at acute angles. Both the maxillary and the 

 dentary bones have their oral margins set at short intervals with stout, conical, pointed 

 and incurved teeth, between which may be observed others of smaller size and more 

 externally placed. The opercular bones are ill-preserved, though evidently arranged in 

 Palaeoniscid fashion ; and the external head-bones in general are marked with closely-set 

 ridges resembling those ornamenting the outer surface of the jaws. 



The clavicle is of the form characteristic of this family, and is externally ornamented 

 with ridges which are coarser than those of the facial bones. The pectoral fin is partly 

 seen in PI. XXII, fig. 1, but its contour is better displayed in a specimen not figured ; 

 it is acuminate in form, and its principal rays are unarticulated up to about a third of 

 their length. The ventral fin is long-based, and in front acuminate; both it and the 

 anal seem large for the size of the fish, while the dorsal, placed about the middle of the 



Fig. 4. — Restored figure of Crgphiolejns striatus, Traq. 



back and arising over the interval between the ventral and the anal, is apparently pro- 

 portionally smaller; the caudal is completely heterocercal, deeply cleft and inequilobate. 

 The rays of all the fins are numerous, closely set, and divided by transverse articulations 

 which leave the joints rather larger than broad ; their outer surfaces are brilliantly 

 ganoid, and ornamented by a few longitudinal grooves, which in the rays of the upper 

 lobe of the caudal are sufficiently numerous and close to form a regular striation. 



The caudal body-prolongation is bordered above by a row of acutely-pointed, 

 strongly striated V-scales ; those clothing its sides also conform to the ordinary PalaBO- 

 niscid type, being minute, acutely lozenge-shaped, and externally nearly smooth, their 

 ornament consisting only of one or two longitudinal grooves. 



On the tail-pedicle, and over all the rest of the body, the scales (fig. 4) are thin 

 and of a rounded shape, though it must also be observed that in few cases are they 

 quite symmetrically rounded, there being usually more or less of a peculiar obliquity 

 of form, which reminds us to some extent of the rhombic contour of the ordinary 



