307 



widely separate, elongate, pearshaped patches, slightly bent, 

 narrow, and not much shorter than the eye, somewhat con- 

 vergent posteriorly. Olivaceous above, whitish or silvery below. 

 Fins yellowish, more or less dusky. Length of only specimen 

 known 21 1 mm. [After Bleeker and Giinther, not seen by us]. 



Nomen in dig: Keteng (Madura). 



Habitat: Madura sea near Surabaya. 



In sea. 



23. Arius froggatti Rams. & Ogilb. 



Arius froggatti Ramsay & Ogilby, Proc. Linn. Soc. N. S. Wales (2) I. 1886, p. 14. 

 Cine todus froggatti I. Douglas Ogilby, Proc. Linn. Soc. N. S. Wales, 1898^.32. 



D. I. 7; A. 19; P. I. ii; V. 6. 



Height 5 ! / 3 in the total length. Head somewhat depressed, 

 wider than deep, 4 2 / 3 in the total, its upper profile straight, 

 gradually rising to the origin of the dorsal fin. Mouth small 

 and crescentic, the width of its gape 3'/ 4 in the length of 

 the head; upper jaw slightly projecting; lips thin, without 

 posterior lobe. Eyes small and lateral, their diameter J / 5 of 

 the length of the head, 5 / 8 of that of the snout, which is 

 obtuse and equal to the breadth of the bony interorbital 

 space. Occipital process triangular, nearly as broad as long, 

 with a crest. Posterior part of head densely granulated, as 

 also are the edges of the occipital fontanel, which is narrower 

 and much shorter than the interorbital fontanel; supraorbital 

 fontanel present; otic fonticle small and circular. Humeral 

 process granular. The maxillary barbel extends backwards to 

 the base of the pectoral fin, the mandibulary one not quite so far. 

 Dorsal fin inserted above the interspace between the pectorals 

 and ventrals; its height equal to height of body, its spine as 

 long as the head behind the posterior nostril; it is strongly 

 granulated in front for two thirds of its height ; the remaining 

 third and the entire back being weakely serrated. Adipose 

 fin opposite to anal, the length of its base equal to that of 

 the rayed fin. Pectoral spines very strong, considerably longer 

 than the dorsal spine, slightly ruffened on the outside and 

 strongly denticulated on the inside. They almost reach to the 

 ventrals, which on their part just touch the anal fin. Caudal 

 4 2 / 3 in the total length, deeply forked, the upper lobe the 

 longer. Jaws with broad bands of small, conical, acute teeth ; 



