252 
above the corner of the mouth, the mandibulary barbels 
behind the symphysis. Dorsal well developped, with 6—7 
soft rays and a strong flattened denticulated spine, which is 
preceeded by a broad but very low rudimentary spine. Adipose 
fin small. Anal fin elongate with 36 or more rays, distant 
from caudal, ventrals well developped with 6 rays, pectorals 
with a strong flattened denticulated spine. Caudal forked. 
Teeth in the jaws in a broad band or in the upper jaw in 
two separate patches, the vomerine teeth in two separate 
bands or patches. g branchiostegal rays; no teeth on the 
palatine. Gillmembranes united anteriorly, free from isthmus. 
Fig. 102. Helicophagus waandersi Blkr. 
Sy Mopsissof the species: 
I. Anal 30, more than thrice in length. Teeth in the 
upper. jaw in a’ broad ‘curved band 5 . <0. 7 ieon =: HT, typus p. 252. 
Il, Anal 37 or more, 23/, in length. Teeth in the upper 
jaw in two nearly quadratic patches.......... fT. waandersi p. 253. 
1. Helicophagus typus Blkr. 
Helicophagus typus Bleeker, Act. Soc. Sci. Indo-Neerl. III. 1858, p. 46. 
Helicophagus typus Bleeker, Atl. Ichth. II. 1862, p. 78. 
Helicophagus typus Giinther, Cat. Brit. Mus. V. 1864, p. 64. 
BasQ32D. 1. 6-75 A. 3290=-30;3°P. 1. £I=—13 70NERG: 
Elongate, slightly compressed, head conical, profile behind 
dorsal nearly straight, before dorsal sloping down in a straight 
line to the prominent snout. Height behind dorsal about 5, 
head 4°/,. Mouth subterminal. Anterior nostrils pierced through 
the frontborder of the snout and looking forward, posterior 
nostrils more distant from each other, halfway between the 
anterior ones and the eye. Maxillary barbels extending nearly 
to the pectoral spine, mandibulary barbels about '/, longer. 
