225 
in front of which a nasal barbel. A maxillary barbel near the 
end of the upperlip, a mandibulary barbel below the corner 
of the mouth, two mental barbels between the mandibulary 
barbels. Eye not covered by skin. First dorsal short, behind 
origin of pectorals, with few rays and a strong spine, denticu- 
lated at both edges. Origin of second dorsal before or above 
origin of ventrals. It is many-rayed, similar to anal and both are 
confluent with the caudal. Ventrals with 12—13 rays. Pectorals 
with a denticulated spine. Maxillary teeth in two rhombic 
patches with the lateral edges rounded, conical with rounded 
tops. The median ones the strongest. Inframaxillary ones in 
two approximated semicrescentic patches, the anterior row 
strong and. conical, the posterior ones molars, mesially in 
4 rows. Vomerine teeth molar, in a crescentic patch, in 
the middle in about 4 rows, the hindermost the strongest. 
22 gillrakers on the entire first arch. The second and third 
branchial arches with a series of long cartilaginous processes, 
covering the base of the gill-laminae on the sides facing each 
other. Gillmembranes confluent in the middle, only the anterior 
portion of their confluent part connected with the isthmus. 
Branchiostegals 9—11. A very conspicuous dendretic organ 
between anus and anal. 
I. Paraplotosus albilabris (C. V.). 
Plotosus albilabris Cuvier & Valenciennes, Hist. Nat. Poiss. XV. 1840, p. 427. 
Plotosus macrophthalmus Bleeker, Verh. Bat. Gen. XXI. I. 1847, Silur. Batav. 
consp. p. 179. 
Plotosus albilabris Bleeker, Ichth. Arch. Ind. Prodr, I. Siluri, 1858, p. 319. — 
Atl. Ichth. II. 1862, p. 99. 
Copidoglanis alvilabris Giinther, Cat. Brit. Mus. V. 1864, p. 27. 
B. 9—11; 1. D. 1. 4—5; 2. D. 1t0oo—110; A. 90—I00; 
P. 1. 12—13; V. 12—13; C. circa 10. 
Height 7—8, head circa 6, anteriorly depressed, posteriorly 
rather high, sloping with little convexity to the snout. Eye 
4—6, more than twice in snout, 1'/, times in interorbital 
space, which is concave. Nasal barbels reaching to hindborder 
of operculum or farther, maxillary ones shorter. Mandibu- 
lary barbels much longer than mental ones and almost or 
quite reaching base of pectorals. Height of first dorsal about 
*/, length of head, its spine as long as postorbital part of 
INDO-AUSTRALIAN FISHES II. 15 
