ACKONTJEID^ 
563 
AulorhampTius canossce ; Acanthurus canossce, J. J. Heckel, 
Denkschr. k. Akad. Wiss., math.-naturw. Cl, vol. xi. pt. i. 
(1856), p. 258, pi. xii. figs. 6, 7; A. B. Massalongo, , 
Specimen Pliotogr. Anim. Foss. Agr. Veron. (1859), p. 25, 
pi. vii. fig. 2. Calamostoma canossce, F. Steindachner, 
loc. cit. 1863, p. 133.—Ibid. [Imperfect fish; Court 
Museum, Vienna.] 
Aulorhamphus capellinii, A. de Zigno, loc. cit. 1887, p. 23, fig. 5. 
—Ibid. [Imperfect fish; Zigno Coll., University of 
Padua.] 
Genus APOSTASIS. Kramberger. . v 
[Pad Jugoslav. Akad. vol. cvi. 1891, p. 104.] 
An imperfectly known extinct genus, comprising small species 
with snout not much produced and teeth simply conical. Pre- 
operculum serrated. Spinous portion of dorsal fin more developed 
than articulated portion. Scales with thickened hinder border 
bearing few stout spines ; no caudal spines. 
The following species have been described but are not represented 
in the Collection :— 
Apostasis croatica, D. G. Kramberger, Pad Jugoslav. Akad. 
vol. cvi. (1891), p. 106, pi. iii. fig. 1. Acanus croaticm, 
D. G. Kramberger, loc. cit. vol. Ixxii. (1885), p. 60.-^— 
Upper Miocene; Podsused, Croatia. [The type species, 
supposed to have 6 or 7 articulated rays in pelvic fins but 
uncertain. Imperfect fish ; Geological Museum, Univer¬ 
sity of Agram.] 
Apostasis sturi, D. G. Kramberger, loc. cit. vol. cvi. (1891), p. 106. 
Acanus sturi, D. G. Kramberger, Jahrb. k. k. geol. Peichs- 
anst. vol. XXX. (1880), p. 566, pi. viii. fig. I,-—Middle 
Oligocene ; Wurzenegg, near Prassberg, Steiermark. 
: " n-TX 
Genus ACANTHURUS, Forskll. 
[Descr. Anim. 1775, p. 59.] 
/ 
Teeth lobate and denticulated. Spinous portion of dorsal fin less 
■extended than articulated portion; anal fin with 3 spines. All 
scales minute and ctenoid, sometimes spiny; one erectile spine on 
each side of the caudal pedicle. 
The skeleton of Acanthurus triostegus is described by A. Gunther, ^ 
Catal. Fishes B. M. vol. iii. (1861), p. 327. 
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