594 
ACTINOPXERYGII. 
feebly crimped or smooth, the upper enlarged flank-series smaller 
than the lower enlarged flank-series. 
Form.. ^ Log. Upper Eocene : Monte Bolca, near Verona. 
P. 4141. Eine specimen about 0*77 in length, deepened by distor¬ 
tion at the back of the head, which is figured by Agassiz, 
tom. Git. pi. xliv. fig. 1. The hinder part of the cranium 
is crushed upwards, while the mandible is displaced 
downwards, so that both its slender rami are seen from 
beneath. The mandible does not appear to have extended 
much further forwards than the base of the rostrum. 
Small scutes are seen to extend over the opercular appa¬ 
ratus ; and the ossified sclerotic is partly preserved. The 
pectoral fins are displaced but both shown as indicated in 
Agassiz’s figure ; the lowermost exhibiting three of its basal 
bones in position. Comparatively small and delicate rays 
in front of the pectorals may represent pelvic fins, but it 
is uncertain whether these are not merely branchiostegal 
rays. The dorsal fin-spines have the appearance of 
extending forwards over the head merely in consequence 
of the displacement of parts just described. The depth of 
the abdominal region in the fossil must also be less than 
was actually the case during life. Enniskillen Coll. 
P. 4142. More imperfect and distorted larger specimen, showing the 
mandible as before, and the parts of the cranium much 
scattered. Immediately in front of the frontals, the 
fractured base of the rostrum seems to consist of a pair of 
tubes pressed together like those of the so-called Coelo- 
rhy7iGhus. A longitudinal series of rather large perforations 
penetrating the dense armour of the hinder part of the tail, 
appears to mark the course of the lateral line. 
Enniskillen Coll. 
19940. Eine small fish, distorted like the preceding specimens at 
the back of the head and in the abdominal region. The 
slender mandible is seen to extend not much further 
forwards than the base of the rostrum; and the delicate 
suspensorium is displaced between it and the cranium. 
Small scutes extend over the triangular operculum and 
perhaps over part of the cheek. The haemal arches of most 
of the vertebrae are observable, and used in the accom¬ 
panying restoration (fig. 22). The median fins and dermal 
scutes are also well preserved ; the enlarged flank-scutes 
