224 
dorsal before or aboye origin of ventrals. Only anterior 
portion of gillmembranes confluent with isthmus . . Paraplotosus p. 224. 
2. Anterior nostril in the frontborder of the upperlip, 
looking upward or forward. 
a. Gillmembranes free from isthmus. Origin of second 
dorsal abehingd gvienital Semen eee ilies Plotosus p. 226. 
6. Gillmembranes united to the isthmus. Origin of 
second dorsal before or above origin of ventrals. 
a, Conical teeth in the jaws, besides molarlike 
in mandiblesand Sonevomenre-n.n ocr Cnidoglanis p. 231. 
f@. No maxillary and no molarlike teeth ..... Oloplotosus p. 232. 
II. No praeanal dendritic organ. 
1. Interior border of upperlip perforated by the anterior 
nostril, which looks downward. Dorsal spine without 
SEVLALUTE a. yo a eu ctys cet esataerormento toric as Rome emise aaaereme Porochilus p. 234. 
2. Anterior tubular nostril in the frontborder of the 
upperlip, looking forward. Dorsal spine serrated 
[SININGE oo Boo Goo OIG DOD OOO og oOo Copidoglanis p. 235. 
1. Paraplotosus (Bleeker) de Beaufort. 
(BLEEKER, Atl. Ichth. II. 1862, p. 100. (nomen solum)). 
(De Beauror’. Bijdr. Dierk. Afl. 19. Amsterdam 1913, p. 97). 
Elongate, tail tapering, head depressed, mouth transverse, 
rounded in front. Lips thick with papillae and vermiculated 
folds. Upperlip very prominent, perforated at its border near 
Fig. 88. Paraplotosus albi- 
labris (C.V.). View of mouth 
and lips from below. z nostril, 
z teeth, md mandibulary, m Fig. 89. Inner view of second branchial arch 
mental barbels. of Paraplotosus albilabris (C. V.). 
the mouthopening by the anterior nostrils which look down- 
wards and are surmounted anteriorly by a very prominent 
caniculated lip. Posterior nostril a slit between eye and upperlip 
