Habitat: Borneo (rivers Mahakam, Barito, Kapuas, Sara- 

 wak); Sumatra (Palembang!, Rokan river!, Djambi !). Ma- 

 lacca, Siam. 



In rivers. 



5. Macrones nemurus (C. V.). 



Bagrus nemurus Cuviev & Valenciennes, Hist. Nat. Poissons, XIV. 1839, p. 423. 

 Bagrus Hoevenii Bleeker, Nat. & Geneesk. Arch. Ned. Ind. Ill (2). 1846, p. 154. 

 Bagriis Sleboldii Bleeker, Nat. & Geneesk. Arch. Ned. Ind. Ill (2). 1846, p, 155. 

 Bagrus nemurus Bleeker, Ichth. Arch. Ind. Prodr. I. Siluri, 1858, p. 150. 

 Bagrus Hoevenii Bleeker, Ichth. Arch. Ind. Prodr. I. Siluri, 1858, p. 153. 

 Hemibagriis nemurus Bleeker, Atl. Ichth. II. 1862, p. 55. 

 Hemibagrus Hoevenii Bleeker, Atl. Ichth. II. 1862, p. 56. 

 Macrones nemurus Giinther, Cat. Brit. Mus. V. 1864. p. 80. 

 Macrones nemurus Vinciguerra, Ann. Mus. Civ. Geneva, XVI. 1880, p. 169. 

 Macrones Hoevenii Vinciguerra, Ann. Mus. Civ. Genova, XVI. 1880, p. 170. 

 Macrones bleekeri Volz, Zool. Anz. XXVI. 1903, p. 556. Zool. Jahrb. Abt. 



Syst. XIX. 1903, p. 387. 



Hemibagrus nemurus Fowler, Proc. Acad. Nat. Sci. Philad. (2) LVII. 1905^.469. 

 Macrones hoivong Popta, Notes Leyden Mus. XXIV. Jan. 1904, p. 181. o. c. 



XXVII. 1906, p. 32. 

 Macrones bongan Popta, Notes Leyden Mus. XXIV. Jan. 1904, p. 182. o. c. 



XXVII. 1906, p. 35. 

 Macrones bo Popta, Notes Leyden Mus. XXIV. Jan. 1904, p. 183. o. c. XVII. 



1906, p. 38. 

 Macrones kajan Popta, Notes Leyden Mus. XXIV. Jan. 1904, p. 184. o. c. 



XXVII. 1906, p. 41. 

 Macrones fortis Popta, Notes Leyden Mus. XXIV. Jan. 1904, p. 185. o. c. 



XXVII. 1906, p. 44. 

 Macrones fortis var. capitrtlum Popta, Notes Leyden Mus. XXIV. Jan. 1904, 



p. 186. o. c. XXVII. 1906, p. 48. 



B. ii 12; D. II. 7; A. 1213; P- I- 8 9; V. 6. 



Oblong, dorsal profile elevated before dorsal; head flattened, 

 snout spatulate, prominent. Mouthopening crescentic, subter- 

 minal. Height about 5, head 3 3'/ 2 , broader than high, its 

 greatest width about equal to its length without snout. Eye 

 6 S ! / 2 > 2 to nearly 3 in snout, which is equal to about ! /a 

 of the head. Shields of the head striated, rugose, with a median 

 groove ending before the slender occipital process, which is 

 triangular and longer than broad at its striated base. Nasal barbels 

 reaching the eye, maxillary barbels extending to anal or not so 

 far, mandibulary barbels reaching base of pectorals, mental ones 

 conspicuously shorter. Dorsal with the second ray the longest, 

 slightly shorter than head, the osseous part of its spine nearly 

 equal to postorbital part of head, its base longer than that 



