SCOMBRIDJE. 
465 '' 
distinct. Immaturity is indicated by the radiating ridges 
and serrations on the preoperculum. EanislciUen Coll. 
The following species have also been founded on imperfect fossils, 
but are not represented in the Collection :— 
Auccis c^oaticus, D. G. Kramberger, Beitr. Palaont. Oesterr.- 
Ungarns, vol. ii. (1882), p. 121, pi. xxv. fig. 1.—Upper 
Miocene ; Badoboj, Croatia. [Imperfect fish; University 
Geological Museum, Agram.] 
Au,vis minor, 1). G. Kramberger, loc. cit. 1882, p. 123, pi. xxiv. 
figs. 5, 6.—Ibid. [Imperfect trunk ; Imperial Geological 
Survey, Vienna.] 
Auxis stiriacus, D. G. Kramberger, Djela Jugoslav. Akad. vol. xvi. 
(1895), p. 64, pi. xi. fig. 4, pi. xii. fig. 2.—Oligocene; 
St. Georgen, near Zilli, Croatia. [Imperfect fish ; Zilli 
Museum.] 
Auxis thynnoides, D. G. Kramberger, loc. cit. 1882, p. 125, 
pi. xxvi. figs. 1, 2.—Upper Miocene ; Podsused, Croatia. 
[Imperfect trunk, in counterpart; Imperial Geological 
Survey, Vienna, and University Geological Museum, 
Agram.] 
Auxis D. G.Kramberger, loc.cit. 1882, p. 122, pi. xxiv. 
fig. 4.—Upper Miocene ; Vrabce, Croatia. [Imperfect 
trunk ; University Geological Museum, Agram.] 
Genus CYBIUM, Cuvier. 
[Begne Animal, ed. 2, vol. ii. 1829, p. 199.] 
Syn. Scomberodon, P. J. Van Beneden, Bull. Acad. Roy. Belg. [2] 
vol. xxxi. 1871, p. 504. 
Trunk elongate-fusiform; the slender caudal pedicle with strong 
median lateral keel formed by cartilaginous ridge on vertebral 
centra. Median pair of fossae for anterior extension of lateral 
muscles of trunk produced forwards over frontal bones and separated 
by median frontal ridge continuing the supraoccipital ridge. Teeth 
on margin of jaws large, conical, and laterally compressed, with 
opposite sharp edges ; minute teeth on vomer and palatines ; gill- 
rakers few. Vertebral centra constricted, with two lateral pits 
separated by a longitudinal ridge; all haemal arches simple. Paired 
fins small; dorsal fins well separated, the anterior consisting of 
14 to 18 feeble spines ; posterior dorsal and anal fins small but 
elevated, similar and opposite, followed by 7 to 10 detached finlets; 
caudal fin deeply forked, with slender lobes. Scales very small 
PART IV. 2 H 
