318 
ACTINOPTERYGII. 
i 
Genus ASPIUS, Agassiz. 
[Mem. See. Sci. Nat, Neuchatel, vol. i. 1835, p. 38.] 
As Rhocleus, but pharyngeal teeth hooked and in two series ; 
lateral line complete, extending along the middle of the side of the 
tail. 
The extinct species mentioned below are merely referred to Aspius 
rather than to Rhodeus on account of their slender proportions. 
Aspius gracilis, Agassiz. - P 
1818. Cpprinus bipunctatus ?, H. D. de Blainville, Nouv. Diet. d’Hist. 
Nat. vol. xxvii. p. 377. 
1832.' Aspius gracilis, L. Agassiz, Neues Jahrb. p. 134 (name only), 
1835-39. Aspius gracilis, L. Agassiz, Poiss. Foss. vol. v. pt. ii. p. 37, 
pi. Iv. figs. 1-3. 
Type. Nearly complete fish ; olim Lavater Coll., Zurich. 
A very small species, attaining a length of about 0*1. Length of 
head with opercular apparatus about equal to the maximum depth 
of the trunk and contained four times in the length to the base of 
the caudal fin. Vertebrae 18 in the abdominal, 16 in the caudal 
region ; 13 pairs of ribs. Pelvic fins with 9 rays ; dorsal fin com¬ 
pletely in advance of anal, with 10 rays, the foremost being a short 
spine, the second articulated, the others both articulated and 
divided distally; anal fin with 15 rays, the two foremost like those 
of the dorsal. 
Form. Log. Upper Miocene : Oeningen, Baden. a. 
36121-22. Fine specimen 0*1 in length, in counterpart. 
Purchased, 1859. 
P. 3864. Smaller specimen, labelled by Agassiz. EnnisMllen Coll. 
Aspius minutus (Winkler). - /■ / A- 
1861. Cliondrostoma minutum, T. C. Winkler, Descript. Poiss. Foss. 
d’Oeningen (Natuurk. Verhandl. Holland. Maatsch. [2] vol. xiv,), 
p. 37, pi. iv. fig. 12. 
Type. Nearly complete fish ; British Museum. 
A smaller and more slender species than A. gracilis, with larger 
head, only 9 rays in dorsal fin, and apparently 13 rays in anal fin; 
otherwise similar. 
Form. Loc. Upper Miocene : Oeningen, Baden. 
42789. Type specimen, in counterpart. Van Breda Coll. 
