141 
Caudal rounded, longer than head. Pectoral pointed, as long as the 
head. The diameter of the ventral disk is the half of the length of the 
pectoral. 
Colour in spirits brownish, whitish on the belly and at the under- 
side of the head, the chin however being blackish. 7 or 8 indistinct 
dark transverse bands on the back. A black stripe running from the 
eye to the corner of the mouth. First dorsal whitish, with an indistinct 
dusky spot between the third and fifth ray. The hinderpart of the first 
dorsal and the whole of the second dorsal variegated with dusky dots. 
Caudal blackish, its upper and under margin broadly edged with white. 
Pectoral blackish, with a broad clear white margin, narrowing towards 
the tip. Ventrals white. 
3 spec. 49—97 mm, upper course of river Tubah, W. Ceram, Fe- 
bruary 27% 1910. 
This species differs from all other Indo-australian Sieyopterus by 
the enormous development of its dorsal fins. It seems to be closely al- 
lied to S. pugnans O. Grant from Savaii, from which it differs in being 
less elongate, in having tricuspid in stead of bicuspid teeth in the upper 
jaw and in having a greater number of scales in the linea lateralis and 
transversalis. According to the figure there is also a difference in the 
place of the eye, which is represented as being nearer to the tip of the 
snout than to the hind margin of the operculum. 
Sicyopterus brevis n. sp. 
Da Willy lot ho As 12,11, 2362, tre e 
The height of the body is contained 51/, times in the total length, 
43/, times in the length without caudal. The length of the head is con- 
tained 41}, times in the total length, 33/, in the length without caudal. 
The eye is situated in the middle of the length of the head. The dia- 
meter of the eye is 1/, of the length of the head. The eyes are 11/, times 
their diameter apart. Upperlip without median cleft. No papillae on 
the gum beneath the upper lip. Teeth in the upper jaw tricuspid. The 
first and the two last mandibular teeth caninoid, the middle ones mi- 
nute. The maxilla does not reach quite as far as a vertical from the 
middle of the eye. Head naked, except the occiput. The cycloid scales 
on the occiput and neck and on the belly are smaller than the ctenoid 
ones along the sides of the body and on the tail. The length of the 
third and longest ray of the first dorsal is equal to the height of the 
body. Second dorsal and anal much shorter than the height of the body. 
The pectoral is shorter than the head. The longitudinal diameter of 
the ventral disk is more than the half of the length of the head. Colour 
in spirits yellowish. A dark longitudinal band along the sides of the 
