65?^ ^ ]: yc^e -/r\ ^a^. /au. (%y^ 
/r^.i?.^^. '^^/<?-z^./3 ^^-^^, S'e 
334 ACTINOPTERYGII. 
A large species, the head measuring about 0’2 in length. External ' 
bones ornamented with a coarse rugosity, no distinct tubercles. 
Maximum width of cranium slightly exceeding half its length from 
the occipital border to the end of the snout; orbits situated exactly 
in the middle; posterior extension of supraoccipital bone narrow, 
not keeled, about twice as long as broad, with nearly parallel sides, 
and its hinder border slightly notched by an acute re-entering 
angle. 
Form. Log. Tertiary Lignite: Taubate, Province of San Paulo, 
Brazil. 
P. 9220. Type specimen, the skull chiefly in impression of dorsal 
aspect, shown of nat. size in PI. XYII. flg. 4. 
Presented hy John Gordon^ Esq., 1900. 
P. 9221. Larger, more imperfect specimen, very friable, noticed 
loc. cit. p. 64. Presented hy John Gordon, Esq., 1900. 
The following specimens also appear to be referable to Arms :— 
P. 6331. Eight otoliths, described and one figured by E. T. Xewton, 
Proc. Zool. Soc. 1889, p. 205, pi. xxi. fig. 7 (drawing not 
reversed), under the name of Arms haroni, sp. nov.; 
Eecent(?), Ankoala, Madagascar. 
Presented hy Rev. R. Baron, 1889. 
16402 d. Hinder part of large cranium, described and figured as 
Arius sp. a by E. Lydekker, Palaeont. Indica, ser. x. 
vol. hi. (1886), p. 252, pi. xxxvi. fig. 2; Pliocene, Siwalik 
Hills, India. 
Presented hy Col. Sir Prohy T. Cautley, K.C.B., 1842. 
P. 4923. Large, externally ornamented bone; Pliocene, Siwalik 
Hills. Transferred from India House Museum, 1880. 
The following otoliths have also been ascribed to this genus:— 
Otolithus (Arius) germanicus, E. Koken, Zeitschr. deutsch. geol. 
Ges. vol. xliii. (1891), p. 81, pi. i. fig. 3, pi. vi. fig. 8.— 
Lower Oligocene; Lattorf, Westeregeln, and Osterwed- 
dingen. Middle Oligocene; Sollingen, Weinheim, Wald- 
bockelheim. 
Otolithus (Arius) vangionis, E. Koken, loc. cit. 1891, p. 81, 
pi. vi. fig. 4.—Middle Oligocene ; Waldbockelheim. 
Otolithus danicus, E. Koken, loc. cit. 1891, p. 81. Otolithus cf. 
(incertce sedis) crassus, E. Koken, Abb. phys. Cl. k. Ges. 
Wiss. Gottingen, vol. xxxii. (1885), p. 116, pi. v. fig. 29.— 
Lower Eocene; Copenhagen. 
