SILTJKID^. 
327 
47527. Type specimen figured by Giintber, loc. cit. 
Presented hy Herr R. D. M. VerheeJc, 1876. 
47531. Second specimen noticed by Giintber, loc. cit. p. 4-35. 
Presented hy Herr R. D. M. Verheeh, 1876. 
47528-30, 47537. Four specimens, tbe second being a very large 
tail. Presented hy Herr R. D. M. Verheeh^ 1876. 
An indeterminable fragment has been referred to the existing 
African genus Clirysiclitliys^ Bleeker, as follows :— 
Chrysiclithys (?) theohaldi^ E,. Lydekker, Palseont. Indica, ser. x. 
vol. iii. (1886), p. 249, pi. xxxvii. fig. 4.—SiwaUk 
Formation; Punjab. [Hinder portion of cranium; Indian 
Museum, Calcutta.] 
Genus IVIAQKdNES, Dumeril. <?• /Tf. /7. C i-') 
[Ichthyol. Anal. 1856, p. 484.] . 
Head depressed, the cranial bones solid, more or less orna¬ 
mented and covered with thin skin ; an antero-posteriorly elongated 
frontal vacuity. Gape of mouth moderately wide; teeth minute 
and villiform, some on the vomer and palatines. Pectoral fin 
with robust spine; pelvic fin with six rays; dorsal fin short- 
based, with a robust spine and seven rays, in advance of the pelvic 
fins; an adipose dorsal fin of moderate length ; anal fin short-basedy 
with less than twenty rays ; caudal fin forked. Skin naked. 
An existing Asiatic genus. 
Macrones aor (Buchanan). 
1822. Pimelodus aor, F. H. Buchanan, Fishes found in Hiver Ganges, 
pp. 205, 379, pi. XX. fig. 68. 
1839. Rayrus aor, Cuvier & Valenciennes, Hist. Nat. Poiss. vol. xiv. 
p. 405. 
1864. Macrones aor, A. Giintber, Catal. Fishes B. M. vol. v. p. 78. 
1886. Macrones aor, E. Lydekker, Palaeont. lodica, ser. x. vol. iii. 
p. 250, pi. xxxvi. fig. 5. 
Type. Eecent fish. 
Defined by Gunther, loc. cit. 
Form. 4' Loc. Lower Pliocene : Siwalik Hills, India. Eecent in 
freshwaters of India. 
40822. Imperfect skull and mandible, described and figured by 
Lydekker, loc. cit. 
Presented hy Charles Falconer, Esq., 1867. 
