192 1.] S. L. HORA : FisJi jroin tJie E. Himalayas. y2>7 



This interesting species has so far been known from a single 

 specimen in our collection found in a pond at Mariani junction, 

 Assam. In Mr. Shaw's collection there are three specimens from 

 the Sivoke River (alt. 500 ft.) in the Darjiling District^ which 

 agree in almost all respects with Chaudhuri's description of the 

 species. They are 70, 60 and 56 millimetres in length respect- 

 ively. 



Quite recently' I have separated this .sj^ecies alcng with 

 Macrones affiiiis (Blyth) '^ and M. dayi, Vinciguerra.^ into a dis- 

 tinct subgenus Macronoides. The fishes of this subgenus are readi- 

 ly distinguished by their short barbels which do not exceed the 

 length of the head, by the possession of pores on the under sur- 

 face of the head and by the fact that the mandibular pairs of 

 barbels are placed in an alm.ost horizontal line. 



MacroHCS marianicnsis is known from the Abor Hills and the 

 base of the Darjiling Himalayas. 



Olyra kempi, Chaudhuri. 



1912. Olyra keinpi, Chaudhuri, Rec. hid. Miis. V'll, p. ^43, pi. x], 

 figs. 4. 4a, 46. 



Chaudhuri [op. cit.) described ihis species from five young 

 specimens, the largest measuring 54 mm., which were collected by 

 Dr. S. W. Kemp in the Darrang District (Assam-Bhutan Frontier). 

 There is one specimen in Mr. vShaw's collection which measures 

 78 mm. in length and which closely resembles the type-series 

 except in colour. The Darjiling example is dusky with a black 

 caudal fin. The under surface of the head is pale olivaceous while 

 the belly is white. The longitudinal stripes on the body, which 

 Chaudhuri described, are lacking. 



In the specimen both the pectoral sphies are broken which 

 shows that the fish is regarded as poisonous by the local fisher- 

 men. 



The species closely resembles Olyra longicauda, McClell., 

 but in the absence of specimens from the Khasi Hills, it is impossi- 

 ble to make a detailed comparison between the two forms. They 

 can, however, be distinguished by the number of rays in the anal 

 fin. In 0. longicauda there are said to be 23, while in 0. keinpi 

 there are only 17-19. 



Mr. Shaw collected his specimen in the Sivoke River at an 

 altitude of 500 ft. at the base of the Darjiling Himalayas. 

 This is only the second record of this genus from the Eastern 

 Himalayas. 



Pseudecheneis sulcatus (r\IcClell.). 



1S4J. Glyptosternoii stilcatin, .MLClclland, Calcutta 'yoiiru. Xat. Hht. 

 II. p. 587, fig.s. I, 2 and 3. 



' Hora, Rec. Ind. Mus. XXll, pp. 170, 180 ("921). 

 ■2 Blyth, Jovrn. As. Soc. Bengal XXIX, p. 150 (iStd). 



'■ Vinciguerra, Ann. A/ns. civ. Star. Nat. Geneva XXIX. p. ^-^o, pi. \ii, 

 fig. ,3 (1889). 



