EUGNAXH.ID.E. 
311 
Heterolepidotus striatus (Agassiz). 
[Plate VIII. fig. 3.] 
1837-44. Semionotus striatus, L. Agassiz, Poiss. Foss. vol. ii. pt. i. 
p. 231, pi. xxvii a. figs. 6, 7. 
Type. Fish wanting head and tail; British Museum. 
A small imperfectly known species of robust proportions. Head 
and opercular bones ornamented with closely arranged coarse rugae. 
Scales remarkably smooth, those on the anterior part of the body 
with few serrations. 
Form. Sf Loc. Upper Trias : Tyrol. 
P. 3621. The type specimen, described and figured by Agassiz, loc. 
cit. ; Seefeld. The original drawing of the scales is very 
inaccurate, and a new figure is thus given in PI. Till, 
fig. 3. The narrow ventral scales are well shown, and 
quite distinct in form from those of the specimens described 
by Kner as referable to this species (see p. 316). The 
position of the pelvic fins is not indicated, but they would 
probably arise immediately in advance of the dorsal fin. 
Enniskillen Coll. 
P. 3621 a, A more imperfect specimen, apparently of this species ; 
Seefeld. Enniskillen Coll. 
Heterolepidotus cephalus (Kner). 
1866. Pholidophorus cephalus, It. Kner, Sitzungsb. k. Akad. Wiss., 
math.-naturw. Cl. vol. liv. pt. i. p. 325, pi. iv. fig. 2. 
1889. Pholidophorus cephalus , W. Deecke, Pakeontogr. vol. xxxv. 
p. 135, pi. vii. fig. 4. 
1892. Pholidop>horus cephalus, F. Bassani, Mem. Soc. Ital. Sci. [3] 
vol. ix. no. 3, pp. 8, 23. 
Type. Nearly complete fish. 
A very small species. Length of head with opercular apparatus 
equalling the maximum depth of the trunk, and contained about 
three-and-a-half times in the total length of the fish. Opercular 
apparatus [probably also head] ornamented with closely arranged, 
coarse rugae ; operculum much deeper than broad. Dorsal and anal 
fins deeper than long, and the pelvic fins arising in advance of the 
origin of the former. Anterior scales coarsely serrated. 
Form. <$> Loc. Upper Trias : Tyrol, Lombardy, and Salerno. 
21383. Specimen agreeing almost precisely with the .figure given by 
Kner; Seefeld. Purchased, 1847. 
