ACAXTEODTDiE. 
17 
head with branchial apparatus, and contained about five times in 
the total length. Bin-spines slender, the length of the pectorals 
less than the depth of the trunk at their point of insertion, and the 
pelvic spines scarcely more than half as long as these. Pelvic fins 
with much elongated base-line, arising midway between the pec¬ 
torals and the anal; anal spine about equal in size to the pelvic 
spines, and the anal fin separated by a considerable space from the 
caudal. Dorsal fin very large, arising about midway between the 
pelvic fins and the anal. Scales marked with very fine, straight or 
irregularly wavy striae. 
Form. <$f Log. Lower Old Led Sandstone: Banffshire, Nairnshire, 
Cromarty, Boss-shire, Caithness, and the Orkney Isles, Scotland. 
P. 1355. Two crushed specimens in nodules ; Gfamrie, Banffshire. 
Egerton Coll . 
P. 1355 a-b, P. 3257 a-b. Two split nodules, each containing a 
crushed and imperfectly preserved fish ; Gamrie. 
Egerton and Enniskillen Colls. 
36083. Small fish, laterally crushed, showing the pelvic, dorsal, and 
anal fins, and portions of the pectorals and caudal; Tynet 
Burn, Banffshire. Purchased , 1861. 
41412, 41412 a. Small specimen, showing partial impressions of 
the muscular myotomes, and a fish about 017 in length 
with well-preserved remains of the pectoral, pelvic, and 
anal fins ; Tynet Burn. Purchased, 1869. 
P. 1356. Three specimens more or less crushed and distorted, one 
displaying the circumorbital dermal plates ; Tynet Burn. 
Egerton Coll. 
P. 1356 a, P. 3254. Split nodule with greater portion of a fish 
wanting the caudal fin : Tynet Burn. In this specimen 
the cartilages of the jaws and portions of the basipterygium 
are exhibited. Egerton and Enniskillen Colls. 
P. 544. Type specimen of Cheiracanthus microlepidotus, figured by 
Agassiz, loc. cit . fig. 2; Lethen Bar, near Nairn. 
Egerton Coll. 
28865. Two small crushed and contorted fishes, slightly larger than 
the last; Lethen Bar. Purchased, 1854. 
P. 1351. Imperfect fish about 016 in length; Lethen Bar. 
Egerton Coll. 
P. 4814. Bemains of a smaller fish, determined by Agassiz as 
C. microlejoidotus ; Lethen Bar. Enniskillen Coll. 
PAET II. 
C 
