254 
SELACniI. 
Hybodus apicalis, Agassiz. 
1843. Ilyhudm apicalis, L. Agassiz, Poiss. Foss. vol. iii. p. 195, pi. xxiii. 
figs. 1(5-20. 
Type. Detached teeth. 
Tooth very minute, with a higli crown, tlio principal cone tapering 
to a very sharp point. 
Fonn. ^ Loc. Lcttoukohl : Hanover. 
P. 2190. Throe broken teeth ; Hildosheim. Ejerton Coll. 
Hybodus minor, Agassiz. 
1837. Hybodus minor, L. Agassiz, Poiss. Foss. vol. iii. p. 48, pi. viii. h. 
figs. 2, 3 (spine). 
1843. llybodtts minor, L. Agassiz, tom. cit. p. 183, pi. xxiii. figs. 21-24 
(teeth). 
1844. Hybodus vtinor, II. von Meyer & T. Plieninger, Beitr. Pal. Wiirt- 
tumbergs, p. 109, pi. xii. fig. 28. 
1872. Hybodiis minor, R. Etheridge, Proc. Cardiff Naturalists’ Soc. 
vol. iii. pi. ii. figs. 12-14. 
Type. Dorsal fin-spino ; Bristol Museum. Teeth ; British 
Museum. 
A relatively small sjjecies. Teeth with a high crown, much 
resembling U. apicalis, but having the principal cone more slender 
and loss sharply pointed. Lateral denticles 1-3, robust, and the 
coronal superficial wrinkles prominent. Base depressed, flattened, 
expanded posteriorly. 
U 2 >on the dorsal fin-spines, referred by Agassiz to the same 
species, the longitudinal ridges arc rounded, strong, and of approxi- 
mately equal size ; the posterior face is slightly convex, and the 
denticles largo. Some of these sinncs, however, must pertain to 
Acrodus minimus. 
Form. Loc. Ehoctic : Somersetshire, Gloucestershire, Devonshire, 
Leicestershire, and Wiirtemberg. 
P. 2783-4. Teeth described and figured by Agassiz, tom. cit. p. 183, 
pi. xxiii. figs. 23, 24 ; Axmouth, Devonshire. 
Ennislcillen Coll. 
P. 2786, P. 2789. Fourteen detached teeth ; Axmouth. 
EiinisJcilleii Coll. 
P. 2771. One tooth labelled H. plicatilis by Agassiz; Axmouth. 
Ennislcdlen Coll. 
Eyerton Coll. 
P. 2194. Two detached teeth ; Axmouth. 
