1893.] 



FISHES FROM LAKE TAXGA^S'YIKA. 



629 



Glypholycts, g. n. Lycodont. 



Allied to Boodon, but with the dentition of Lampropliis, the 

 maxillary teeth (about eighteen in number) being placed in a con- 

 tinuous series, and the anterior and middle ones being longer and 

 stronger than the posterior; anterior mandibulary teeth stronger 

 than the following. Sides of the bead with a deep longitudinal 

 groove or fold which separates the series of upper labials from the 

 shields above. Head rather small and depressed ; eyes small, 

 with round pupil ; body not compressed ; scales smooth, in twenty- 

 one or twenty-three rows ; anal entire ; sabeaudals in two rows ; 

 nasal semi-divided ; one loreal ; anterior f rentals pointed in front. 



Gltpholycus BicoLon, sp. n. 



Vertical shield rather small, not much larger than the supra- 

 ocular ; occipital as long as the vertical and posterior frontal 

 together ; eight upper labial shields, of which the fourth enters the 

 orbit ; rostral shield reaching the upper surface of the head ; 

 loreal elongate, one anterior ocular not reaching the upper surface 



Pijr. 1. 



Head of Glypholyctm hicolor. 



of the head; two posterior oculars; temporals l-i-2-|-3; ventrals 

 163; subcaudals 56-72. Upper parts uniform brownish lead- 

 coloured ; lower parts and the two outer series of scales whitish ; 

 a brownish line along the meeting edges of the subcaudals. 



Several specimens, of which one measures 26 inches, the tail 

 taking o|. 



Mastacembelus tanganic>e, sp. n. 



D. 33/56. C. 12. A. 2/61. 



Trunk and tail short and compressed, its greatest depth being 

 contained twice and a fourth in the length of the head. Rostral 

 appendage very short. Vertical fins continuous, the length of the 

 tail being but little more than two fifths of that of the head and 

 trunk together. 



Dorsal spines short, the distance of the foremost from the 

 operculum being scarcely half the length of the head. Jjength of 



