PERCID^. 
507 
P. -3907. Five specimens, four being labelled by Agassiz. 
Enniskillen Coll. 
P. 9463. Fine specimen 0*045 in length. Purchased. 
8064. Fish deepened by distortion. History unknown. 
43437,-a. Five specimens, the largest especially well preserved. 
Ko. 43437 a exhibits the characteristic preoperculum. 
Presented hy Kenneth Murchison.^ Esq..^ 1872. 
21419 a-c. Three small specimens. Purchased.^ 1847. 
32486-88. Three small specimens. Tesson Coll. 
Smerdis formosus, Meyer. 
1848. Smerdis for7nosus, H. von Meyer, Neues Jahrb, p. 783. 
1851, S^nerdis formosus, H. von Meyer, Palaeontogr. vol. ii. p. 110, 
pi, xvi. fig. 5. 
Type. Imperfect fishes. 
An imperfectly known small species, about 0*05 in length. Closely 
resembling S. minutus, but with length of head and opercular 
apparatus slightly exceeding maximum depth of trunk, which is 
comparatively slender; second anal spine not much larger than the 
third. 
Form. ^ Log. Lower Miocene: Wiirtemberg. 
35510-11. Two fine specimens; Unterkirchberg, near Ulm. The 
second shows small retrorse serrations on the lower limb 
of the preoperculum. Purchased., 1860. 
P. 3908-09. Four specimens ; Unterkirchberg. Enniskillen Coll. 
35512, 35519. Two imperfect immature specimens ; Unterkirchberg. 
Piurliased., 1860. 
Smerdis macrurus^ Agassiz. 
1835. Smei'dis mact'urus, L. Agassiz, Poiss. Foss. vol. iv. p. 57, pi. vii. 
1880. Smerdis macrurus, H. E. Sauvage, Bull. Soc. Geol. France [3] 
vol. viii. p, 441, pi. xii. figs. 4, 5. 
Type. Imperfect fish. 
The largest known species, comparatively slender, attaining a 
length of about 0*2. Length of head with opercular apparatus 
slightly exceeding the maximum depth of the trunk, which is 
contained between three and four times in the total length to the 
base of the caudal fin. Anterior dorsal fin with 7 spines, posterior 
