('u. OSTEOGENIOSUS. 181 



67. OSTEOGENIOSUS. 



Osteogeueiosus, B/eek. Verh. Bat. Gen. xxi. Silur. Batav. p. 49. 

 Adipose fin short ; a short dorsal fin Avith a pungent spine and 

 with seven soft rajs ; anal fin rather short. Barbels two, belonginj,' 

 to the maxillaries, very stiff, bony. The upper jaw is the longer. 

 Teeth on the palate obtusely conical, in two separate patches. Gill- 

 menibranes united at the throat, emarginate. Caudal forked ; ven- 

 tral rays six. 

 East Indies. 



1. Osteogeniosus militaris. 



Silurus militaris, L. Si/st. Xat. i. p. fiOS. 



Arius militaris, Cuv. Sj- Val. xv. p. 114 pi. 430; Ilyrtl, Deiihschr.Acacl. 



Wiss. Wien, 1859, xvi. p. 17. 

 Osteogeneiosus cantoris, Bleek. Verh. Bat. Gen. xxv. Beng. d)- Hind. 



p. 120. 



D. 1/7. A. 20-23. P. 1/10-11. Vert. 18/29. 



The height of the body is contained from six times to six times 

 and three-fourths in the total length (with the caudal), the length 

 of the head four times and a half or four times and two-thirds ; head 

 distinctly granular above, broader than high, its depth being two- 

 thirds of its length. The diameter of the eye is one-fourth of the 

 width of the interorbital sjiace, which is more than one-half of the 

 length of the head. Occipital process not quite thrice as long as 

 broad. The maxillary barbels extend beyond the end of the head. 



East Indian continent. 

 a, h-c. Half- grown. Ganges. Presented by G. R. Waterhouse, Esq. 

 d. Half-grown. From Dr. v. Bleeker's Collection. — Type of 0. cantoris. 

 d. Young. From the Haslar Collection. 



2. Osteogeniosus valenciennesii. 



Osteogeneiosus valenciennesii, Bleek. Verh. Bat. Gen. xxi. Silur. Bat. 

 p. 51 ; Prodr. Silur. p. 121 : and Atl. Ichth. Silur. p. 46. tab. 6.3. 



gracilis, Bleek. Verh. Bat. Geti. I. c. 



blocliii, Bleek. I. c. 



Arius militaris, Cant. Mai. Fish. p. 259. 



B. 5. D. 1/7. A. 20-22. P. 1/9-10. 



The height of the body is contained from six times and a quarter to 

 six times and three-quarters in the total length (with the caudal), 

 the length of the head from four times and a third to four times and 

 five- sixths; head scarcely granulated above, broader than high, its 

 depth being a little more than one-half of its length. The diameter 

 of the eye is one-third or two-sevenths of the width of the inter- 

 orbital .space, which is rather less than one-half of the length of the 

 head. Occipital process not quite thrice as long as broad. Themax- 

 illar}' barbels extend to or beyond the root of the pectoral. 



Rivers of Java and Banka ; Pinang. 

 «. One of the typical specimens. From Dr. P. v. Bleeker's Collection. 

 h. Adult : skin. Pinang. From Dr. Cantor's Collection as Arius 

 inilitiii'is. 



