290 
SELACHII. 
P. 2733. Twelve teeth associated with the anterior dorsal fin-spine 
of a still smaller fish.^ The spine exhibits very large 
denticles upon the slightly convex posterior face; and the 
lateral ridges are widely spaced, and rounded and nodose 
below. EnmsJcillen (oil. 
P. 3152. Very fragmentary remains of the anterior portion of a 
larger fish. A few scattered teeth are shown, in associa¬ 
tion with three imperfect cephalic spines, and the crashed 
first dorsal fin-spine. The latter is much abraded and 
broken, but the superficial longitudinal ridges upon the 
proximal portion are evidently more rounded than in that 
of No. P. 3153, and faintly nodose ; and the posterior den¬ 
ticles seem to be fixed in the lower part upon a median 
elevation of the hinder face. Enniskillen Coll. 
38125. Remains of the head, with scattered teeth, portions of three 
cephalic spines, and shagreen, in association with the first 
dorsal fin-spine. The fin-spine is more perfect than in 
the last specimen, and exhibits no prominent elevation 
upon the posterior face ; in other features it is similar. 
Purchased, 1864. 
9. 
Associated teeth of Acrodus annivgice, Agassiz.—Lower Lias, Lyme Regis 
(No. 37371). Nat. size. 
37371. Twenty-three teeth associated with the two dorsal fin-spines. 
Five of the teeth and the spines are described and figured 
by E. C. H. Day, loc. cit.; the figures of the teeth being- 
reproduced in the accompanying woodcut (fig. 9). 
Purchased , 1863. 
