Doubtful species. 

 Plotosus macrocephalus C. V. 



Plotosus macrocephalus Cuvier & Valenciennes, Hist. Nat. Poissons, XV. 1840, 



p. 428. 

 Plotostts macrocephalus Bleeker, Atl. Ichth. II. 1862, p. 98 (after Valenciennes' 



description and figure). 



w This species is obtained from Peron, who caught it at 

 Timor, as we believe. It is easily distinguished by its large 

 head, which is J / 4 of the total length, and only ! / 4 less wide 

 than long, and 1 J 2 as high as long. The eyes are ! / of the 

 length of the head, situated in the middle of the head, 2 1 J 2 

 diameters apart, and directed nearly upward. The lips are very 

 thick, furnished with many fleshy thick papils. The nasal 

 and external mandibulary barbels are less than half the length 

 of the head ; the maxillary and internal mandibulary barbels 

 are still shorter, all thickened at their base. 



D. 96; C. ii; A. 95, (tot. 202). 



These numbers are however not absolutely certain, as the 

 end of the tail is mutilated. Our specimen is 18 pouces 

 long. In spirits it is brownish grey above and lighter below." 

 (Translated from Valenciennes). 



Giinther (Cat. Brit. Mus. v. 1864, p. 27, foot note) says that 

 "this fish appears to be allied to Cnidoglanis megastoma, but 

 Valenciennes does not make mention of the peculiar gillopening 

 which we observe in the latter species." 



Macleay (Proc. Linn. Soc. N. S. Wales VII, 1883, p. 592) 

 records Plotosiis macrocephalus C. V. from New Guinea, but 

 does not give any description. Only the native name n Deteira" 

 is mentioned. 



Nothing else can be said about this species as the type 

 specimen can not be found in the Paris Museum, as Dr. Pel- 

 legrin is kind enough to inform us. 



3. Cnidoglanis Giinther. 



(GiJNTHER. Cat. Brit. Mus. V. 1864, p. 27). 



Elongate, tail tapering, head depressed. Mouth transverse, 

 rounded in front. Lips thick, with papillae. Upperlip promi- 

 nent. Anterior nostril on the front border of the upperlip, 



