206 TELEOSTEI.- -PHYSOSTOMI. 



IX 1/6 | 0. P. 1/6. V.6. A. 11(3/8). C. 17. 



Length of head 5, of caudal 4|, height of body 4 iu the total 

 length (excluding the filamentous prolongation of the upper lobe of 

 the caudal fin). Eyes situated slightly behind the middle of the 

 length of the head, diameter 8 in the length of the head, and 2| 

 diameters apart. The greatest width of the head rather less than its 

 length. Upper jaw slightly the longer, median longitudinal groove 

 on the head rather deep and extending to the base of the occipital pro- 

 cess, which latter is three times as long as wide at its base ; humero- 

 cubital process elongated, rough, and with two rounded osseous 

 projections posteriorly ; between the humero-cubital and occipital 

 process is a third intermediate one, the scapular, directed some- 

 what downwards ; basal bone of the dorsal fin not dilated externally. 

 Barbels the nasal short, the maxillary as long as the head, the 

 mandibular, which arise on a transverse line, shorter. Fins 

 dorsal spine strong, nearly as long as the head, rugose anteriorly, 

 denticulated posteriorly ; length of the base of the adipose dorsal 

 equal to that of the first dorsal fin, or the interspace between the 

 two fins ; the adipose fin is one third as high as long. Pectoral 

 spine rather shorter than the head, denticulated internal!}', and 

 with backwardly directed serrations externally. Caudal forked, 

 its upper lobe having a filamentous prolongation. Skin covered 

 with smooth tubercles, most of which are on a rounded base. 

 Colour as in E. Jiara, except that the mandibular barbels do not 

 appear ever to be annulated with black, and sometimes even the 

 maxillary pair are destitute of colour. 



Hob. Eastern Bengal, Assam, Burma as far as the Tenasserim 

 provinces, whence Major Berdmore sent 5 or 6 specimens to the 

 Calcutta Museum. This species is found as high up the Irrawaddy 

 as Prome, and I have also taken it at Bassein. 



220. (3.) Erethistes jerdoni. 



Kara jerdoni, Day, J. A. S. B. xxxix, 1870, pt. 2, p. 39. 



Erethistes jerdoni, Day, Fish. India, p. 453, pi. cii, tig. 3 (see synon.). 



D. 1/5 j 0. P. 1/6. V. 6. A. 10. C. 12. 



Length of head 3f, of caudal 6, height of body 4 in the total 

 length. Eyes in the anterior half of the head, 3 diameters from 

 end of snout. Head one half wider than high opposite the opercles. 

 Median longitudinal groove extends nearly to the base of the 

 occipital process, where it terminates in a small depression. Oc- 

 cipital procees half longer than wide at its base ; cubito-humeral 

 process of an elongated triangular shape, having two prominent 

 ossicles posterior to it ; between these two processes is a third. 

 Barbels the maxillary reach the gill-opening, the others are 

 shorter. Fins dorsal spine half as long as the head, serrated 

 posteriorly ; the length of the base of the adipose dorsal is two 

 thirds of that of the rayed fin. Pectoral spine flattened and rather 

 longer than the distance between the snout and the base of the 



