28 3 



Habitat: Java (Batavia, Surabaya); North of Rio straits!; 

 Singapore; Celebes (Macassar). Malacca. 

 In sea and estuaries. 



6. Arius goniaspis Blkr. 



Arius goniaspis Bleeker, Act. Soc. Indo-Neerl. III. 1858, Vischfauna Sumatra, p. 44. 

 Ariodes goniaspis Bleeker, Ichth. Arch. Ind. Prodr. I. Siluri, 1858, p. 91. 



All. Ichth. II. 1862, p. 42. 

 Arms goniaspis Giinther, Cat. Brit. Mus. V. 1864, p. 166. 



B. 6; D. i. 7; A. 1617; P. i. n; V. 6. 



Elongate. Height about 5, head 3 3 / 5 3 3 / 4 , broader than 

 high, its width i'/ 4 i l / 5 in its length, depressed, crown con- 

 vex, granulated above. Occipital process triangular, with the 

 lateral margins straight, broader than long, subradially granu- 

 lated, with its obtuse, emarginated hindborder touching the 

 short, rugose basal bone of the dorsal spine. The long median 

 fontanel extends nearly to the base of the occipital process. 

 Dorsal profile ascending nearly in a straight line from the 

 acute, convex snout, to the anterior part of the vertex, the 

 posterior part being gibbous. Humeral process rather small, 

 sharp, very rugose. Axillary pore conspicuous. Eye 3 2 / 3 4, 

 superior, situated in the middle of the head, about twice in 

 the interorbital space. Maxillary barbels reaching nearly to 

 end of pectorals, mandibulary ones farther than base of pectorals, 

 mental ones shorter. Dorsal slightly higher than body, about twice 

 higher than long, its spine is of moderate strength, i ! / 3 1*/ 3 

 in head, with the hindborder slightly denticulated, anteriorly 

 only near its tip. Adipose fin small, its base about 5 times 

 in its distance from the dorsal. Anal acute, emarginate, longer 

 than high, about twice longer than adipose fin. Pectorals 

 i ! / s 1 ! / 5 in head, their spine nearly equal to that of the dorsal, 

 but more slender, with similar denticulation. Ventrals about 

 twice shorter than head. Caudal deeply incised, the superior 

 of the acute lobes is the longer. Teeth in the jaws in a villi- 

 form band, slightly curved in the upper jaw and about 4 times 

 longer than broad; in the lower jaw in a nearly semilunar 

 band, slightly longer but more slender. Teeth on the palate 

 conical, granular, arranged in four groups: a small ovate patch 

 on each side of the vomer, and a flat elongate patch along 



