22 
they are shown to be rhombic in shape and approximately equilateral, 
covering the whole trunk and not becoming narrow near the ventral border. 
The lateral line is conspicuous. 
B. — From Soft Grey Shale or Mudstone. 
Family — PAL.ZEONISCI D2E. 
Genus — PAL/EONISCUS, Blainville , 1818. 
(See -page 8.) 
Palceoniscus antipodeus, Eyerton. 
Plate IV, Fig. 7. 
Palceoniscus antipodeus, Egerton, Quart. Journ, Geol. Soc., 1864, xx, p. 4, PI. I, Fig. 4, and 
wood. 
Obs . — Two small specimens are referable to this species, but are not 
sufficiently well preserved to exhibit definite generic characters. The reference 
of the species to Palceoniscus thus still remains doubtful. 
Sp. Char. — A species attaining a length of about 0'2 m, Maximum 
depth of trunk contained three times in the length from the pectoral arch to 
the base of the caudal fin. Pelvic fins arising slightly nearer to the anal 
than to the pectoral fins ; dorsal fin opposed to the space between the pelvic 
and anal fins, but not extending further backwards. Principal flank-scales 
considerably deeper than broad ; from twenty-five to thirty transverse series 
of scales in advance of the dorsal fin. 
General Form. — The nearly complete trunk, perhaps lacking the 
extremity of the upper caudal lobe, is shown in direct side-view in the small 
fossil (PI. IV, Fig. 7). The distorted remains of the head in the second 
specimen prove that its length must at least have equalled the maximum 
depth of the trunk. 
Head.— 1 The large, forwardly placed orbit is seen in the second specimen, 
and a fragment of bone at the back of the head is ornamented with parallel 
ridges, 
Appendicular Skeleton,— All the fin-rays are slender and articulated 
only at distant intervals, As preserved, they do not exhibit any traces of 
ornamentation. A few anterior rays in each median fin gradually increase in 
