172 F. Day — Monograph of Indian Cyprinidce. [No. 3, 



3. Lepidocephalus, six barbels, four rostral, two maxillary. Spine suborbital 

 Dorsal fin sbort, in last two fifths of the body. Malay Archipelago. 



4. Acanthosis, eight barbels, two being mandibular. Spine before the orbit. 

 Dorsal fin of moderate leugth (12 rays), placed opposite the ventrals. Ba.rma. 



5. Colitis, six barbels, all rostral and maxillary. Spine suborbital. Dorsal fin short 

 (9-10 rays), placed opposite the ventrals. India and Banna. 



6. Lepidocephalichthys, eight barbels, two mandibular. Spine suborbital. Dorsal 

 fin short (8-9 rays), placed opposite the ventrals. India. 



7. Botia, six to eight barbels, if six, all are rostral and maxillary, should there 

 be eight, the extra pair are mandibular. Spine suborbital. Dorsal fin of moderate 

 length (10 to 15 rays), commencing anterior to the ventrals. Northern and Eastern 

 India and Barma. 



8. Jerd.onia, eight barbels, two being mandibular. Spine suborbital Dorsal fin 

 long (30 rays), commencing anterior to the ventrals. 



B. Destitute of spine near the orbit. 



9. Nemacheilus, six to eight barbels, rostral and maxillary ; if eight, the extra pair 

 at the posterior nostril. Dorsal short or of moderate length (8 to 17 rays) commencing 

 opposite the ventrals. India ami Bo/rma. 



10. Oreonectes, six barbels, rostral and maxillary. Dorsal fin short (9 rays), far 

 behind the ventrals. China. 



11. Misgurnus, ten to twelve barbels, four being mandibular. Dorsal short (9 

 to 10 rays) , cmmencoing opposite the ventrals. Barma. 



A. With an erectile spine near the orhit. 

 Genus. Aptta, Blyth. 

 Body elongated and compressed. A small, erectile, bifid, suborbital 

 spine. Eight barbels, one rostral pair, one maxillary pair, and two mandibu- 

 lar pairs. Dorsal fin in the posterior third of the body, but anterior to the 

 anal. Ventral fins absent. 



Geographical distribution. — The single species of this genus, which has 

 yet been discovered, was obtained near Pegu in British Barma. 



A SINGLE SPECIES. 

 1. Apuafusca, D. 2/6. A. 2/6. Barma. 



1. Aptta ettsca. 



Blyth, Journal Asiatic Society of Bengal, 1860, p. 169 ; *Giinther, Catal, vii, 

 p. 371 ; Day, Proc. Zool. Soc. 1869, p. 349. 

 B. III. D.2/6. P. 11. A. 2/6. C. 16. 



Length of head 1/8, of caudal 1/9, height of body 1/8 of the total length. 

 Eyes, small, diameter 1/9 of length of head, 4 diameters from end of snout. 

 A small erectile bifid spine below the orbit. Fins. — Dorsal half as high as the 

 body ; caudal rounded. Colours, brownish, with a longitudinal darker band. 

 There are three specimens in the Calcutta Museum, the largest being 2\ 

 inches long. 



Sab. — Barma. 



