314 
ACTINOPTEKTGII. 
Tinea micropygoptera, Agassiz. 
1832. Tinea micropyyoptera, L. Agassiz, Neues Jahrb. p. 133 (name 
only). 
1832. Leuciscus hnrtnianni, L. Agassiz, ibid. p. 132 (name only). 
1832. Leuciscus gracilis, L. Agassiz, ibid. p. 132 (name only). 
1839-44. Tinea micropyqoptera, L. Agassiz, Poiss. Foss. toI. v. pt. ii. 
p. 20, pi. li a. figs. 1-3. 
1839-44. Leuciscus hartmanni, L. Agassiz, ibid. p. 33, pi. lie. fig. 1. 
(Imperfect tail; olim Hartmann Coll.] 
1839-44. Leuciscus gracilis, L. Agassiz, ibid. p. 34, pi. lie. figs. 2, 3. 
[Imperfect small fish ; olim Hartmann Coll.] 
1852. Tinea micropygoptera, F. A. Quenstedt, Handb. Petrefakt. p.237, 
pi. xix. fig. 6. 
1852. Leuciscus hartmanni, F. A. Quenstedt, ibid. p. 236. 
1852. Leuciscus gracilis, F. A. Quenstedt, ibid. p. 236, pi. xix. fig. 3. 
1880. Leuciscus gracilis, F. Bassani, Atti Soc. Veneto-Trent. Sci. Nat. 
vol. vii. p. 84. 
1880. Tinea micropygoptera, F. Bassani, ibid. p. 86. 
Type. Imperfect small fish ; olim Hartmann Coll., Goppingen. 
A large species, attaining a length of about 0*45. Length of head 
with opercular apparatus contained slightly more than three times, 
and maximum depth of trunk slightly more than four times in the 
total length to the base of the caudal fin. About 36 vertebrse, half 
being caudal. Pelvic fins arising opposite the origin of the dorsal, 
which is nearly as deep as the trunk at its insertion and comprises 
10 rays, the foremost being a short spine, the second articulated, 
the others both articulated and divided distally; anal fin with 9 or 
10 rays, like the dorsal but much smaller ; caudal fin distinctly 
forked. 
Form. Log. Middle Miocene: Steinheim, Wiirtemberg. 
36130. Very large specimen with imperfect head, displaying right 
lower pharyngeal from outside. Purchased, 1860. 
P. 3853. Fine specimen about 0*4 in length, showing two of the 
characteristic pharyngeal teeth. EnnisTcillen Coll. 
36443. Fine specimen 0*37 in length. Purchased, 1862. 
35754-59, 38181. Seven small specimens, the largest 0*2 in length. 
Some exhibit the much-expanded anterior ray of the 
pelvic fins. Purchased, 1860-61. 
P. 1821-22. Four very small imperfect specimens, two showing 
the thickened pelvic fin-ray. Egerton Coll. 
