ACAXTHODIDJE. 
10 
Cheiracanthus latus, Egerton. 
18(31. Cheiracanthus latus, Sir P. Egerton, Figs. & Descrips. Brit. 
Organic Remains (Mem. Geol. Surv.), dec. x. p. 73, pi. x. 
1888. Cheiracanthus latus, R. H. Traquair, Geol. Mag. [3] vol. v. 
p. 512. 
Type. Nearly complete fish. 
A species attaining a length of about 03 6 . Body comparatively 
short and stout, the greatest depth exceeding the length of the head 
and contained about four times in the total length. Ein-spines 
stout, the length of the pectorals at least equalling the depth of the 
trunk at their point of insertion, and the pelvic spines two thirds as 
long as these. Pelvic fins with elongated base-line, arising midway 
between the pectorals and the anal; anal spine about equal in size 
to the pelvic spines, and the anal fin extending to the base of the 
very large caudal. Dorsal fin as large as the pectorals, arising mid¬ 
way between the pelvic fins and the anal. Scales marked with few 
large, rounded, parallel ridges and furrows. 
Form. Sf Log. Lower Old Red Sandstone : Banffshire, Scotland. 
The following specimens were all obtained from nodules in Tynet 
Burn:— 
35052. Imperfect fish, wanting the tail. Purchased, 1860. 
35022-23. Two imperfect crushed specimens. 
Presented by the Duke of Richmond, 1859. 
35985. Remains of a large fish. Purchased, 1861. 
36010, 36062. Two specimens of moderate size. Purchased, 1861. 
36064-65. Small specimen, in counterpart. Purchased , 1861. 
37383. Fish wanting the head and the end of the tail. 
Purchased, 1863. 
43015-17. Three crushed specimens, the second showing circum- 
orbital plates, and the scales of the third exhibiting traces 
of fine striations upon the usual coarse ridges and furrows. 
Purchased , 1871. 
43273 a-b, 43274. Specimen in counterpart, wanting the head, and 
a crushed individual with very powerful spines. 
Purchased, 1871. 
P. 1350. Four specimens. Egerton Coll. 
P. 3253. Three specimens. Enniskillen Coll. 
P. 6075. Imperfect specimen, showing all the spines. 
Presented by F. Harford, Esq., 1889. 
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