1871.] F. Day — Monograph of Indian Cyprinidce. 349 



ray, and arising opposite the ventrals ; anal short. Scales very small, 

 the vent and base of the anal fin in a sheath covered by enlarged tiled 

 scales. Lateral line passing to the centre of the base of the caudal fin. 



Geographical distribution. Mountain streams of Himalayas, Cash- 

 mere, Nipal and Afghanistan. 



Synopsis of species. 

 *1. Oreinus progastus, D. 12, A. 7, Assam. 



2. „ sinuatus, D. 4/7, A. 3/5. Anal scales about 1/2 as large as 



orbit. Black spots on body. Cashmere, Punjab, Afgha- 

 nistan. 



3. „ plagiostomus, D. 3/8, A. 3/5. Anal scales about as large as 



orbit. Colouration uniform Cashmere and Afghanistan. 



4. „ Richardsonii, D. 3/8, A. 3/5, L. 1 140. Anal scales nearly 



as large as orbifc. Colouration uniform. Nipdl. 



Geographical distribution. Throughout the Continent of India 

 Ceylon and Burma. 



1. *Oreintjs progastus. 



McClelland, Ind. Cyp. pp. 274, 343, pi. 40, f. 4; *Cuv. and Val., xvi, p. 225. 



Adoee, Assam. 



B. III. D. 12, P. 13, Y. 10, A. 7, C. 19. 



This species is " known by its lengthened and fleshy snout, small 

 mouth, and the suborbital bones form a narrow band below and 

 behind the eyes." 



Fins. " Dorsal anterior to the middle of the body, with a strong 

 ensiform spine, toothed behind." 



"Abdomen abruptly enlarged beneath the pectorals." 



Hab. Assam along its borders, where the stream is too rapid 

 to permit of navigation. It attains from 6 to 8 lbs. in weight. 



This fish a is said by the natives of Assam to occasion swimming 

 of the head and temporary loss of reason for several days, without 

 any particular derangement of the stomach." It " tends rapidly 

 to decay after death, and in the abdominal cavity a copious oily 

 secretion is found, which is probably the cause of its bad 

 effects." 



