CENTRISCID^.-SOLENOSTOMATID^. 
379 
Amphisile heinrichi, Heckel. 
1850. Amphisyle heinrichi, J. J. Heckel, Denksclir. k. Akad. Wiss., 
math.-naturw. Cl. vol. i. p. 224, pi. xxii. .. 
1870. Amphysile heinrichii, H. E. Sauvage, Bull. Soc. Geol. France, [2] 
, vol. xxvii. p. 400, pi. jx. figs. 1-^ ^ j ^ A 
Type, ^mperfect^sh. 2^.-7^ vll'A' ^ s vr. 4 
A species attaining a length of about 0*05. Length of head with \o . \ 
opercular apparatus nearly equalling the length of the dorsal shield 
behind the operculum ; maximum depth of trunk slightly exceeding 
one quarter of the same measure. Operculum and suboperculum 
nearly equal in size, the former ornamented with radiating striae. 
Anal fin with 13 or 14 rays. Dermal armour finely tuberculated ; 
the posterior terminal spine longitudinally ribbed and slightly 
shorter than its pedicle. 
Form. Log. Oligocene : Krakowiza, near Imwald, Galicia ; 
Vienna ^; Hammerstein, Baden ^; E^r|^eimj^ Rhein-Hessen ; Miil- 
hausen, Alsace Eroidefontaine. ^ 
P. 7042, P. 8788. Four fragmentary specimens, ' one being in 
counterpart ; Elorsheim, Rhein-Hessen. 
ParGhasecl.^ 1893, 1898. 
An imperfectly known species, not represented in the Collection, 
has also been described as follows:— 
Amphisile longirostris, L. Agassiz, J7eues Jahrb. 1835, p. 295 
(name only), and Poiss. Foss. vol. iv. (1844), p. 275. 
Centriscus velitaiis, G. S. Volta, Ittiolit. Veronese (1796), 
pi. Ixiii. fig. 2 (errors). Centriscus longirostris., H. D. de 
Blainville, Nouv. Diet. d’Hist. Nat. vol. xxvii. (1818), 
p. 339.—Upper Eocene : Monte Bolca, near Verona. 
[Imperfect fish; unknown.] 
Family SOLENOSTOMATID^. 
Trunk more or less elongated ; snout much produced into a tube, 
and small toothless mouth terminal. Gills tufted, in form of 
rounded lobes ; opercular apparatus reduced to operculum and very 
few branchiostegal rays ; gill-opening wide. Two dorsal fins, the 
^ E. Suess, Sitzungsb. k. Akad. Wiss., math.-naturw. Cl. \ol. liv. pt. i. (1866) 
p. 115. 
- H. von Meyer, Neues Jahrb.4863, p. 449. 
^ Schimper, LTnstitut, vol. xxvii. (1859), p. 193. 
