BATIIYBATES. 437 



spines, anal with 3 ; 14 to 18 soft rays in the anal. Occipital and 

 parietal crests strong, not extending forward to beyond posterior part 

 of interorbital region. Vertebrae 35-36 *. 

 Lake Tanganyika. 



Si/noj)sis of the Species. 



I. Spinous dorsal not notched, the posterior spines subequal ; 3 to 5 series of 

 teeth in tlie upper jaw, 3 in the lower. 



A. Interocular width less than diameter of eye. 

 D. XV-XVI 11-12; A. Ill U; Sc. 65-75 ^fjo'; 



12-13 oill-rakers on lower part of anterior 



'"■''1' I. B. </rauer;, Stdr., p. 437. 



D. XIV-XV 15-16 ; A. Ill lG-17 ; He. 78-100 

 7—8 

 3g::3g ; 13-15 gill-rakers 2. i?. /ajm-, Blor., p. 438. 



D. XIV 14; A. Ill 17 ; Sc. 85 g ; 9 gill-rakers . 3. B. horni, Stdr., p. 440. 



B. Interocular width at least equal to diameter of eye. 

 D. XV 14; A. IK 14-15; Sc. 120-125 ^^^ ; 



12-13 gill-rakers i. B. v'lttatus, Blgr., p. 440. 



D. X VI-XVII lG-17 ; A. Ill 17-18 ; Sc. 140-150 



2!^^'- 16-19 gill-rakers 5. B. fasdatm,V,\g\\,^. ■i^iV. 



II. Spinous dorsal notched, the last s[)ine twice as long as the penultimate ; 

 2 or 3 series of teeth in the upper jaw, 2 in the lower. 

 D. XIII 15-10; A. Ill lG-17; Sc. 90-95 .f^^J, ; 



11-12 gill-rakers . ... . . . . 6. /?. wimo;-, Blgr., p. 442. 



1. BATHYBATES GRAUERI. 

 Steind. Sitzh. Ak. Wien, cxx. i. 1911, p. 1171, pi. i. 



Depth of body 3g- to 3| times in total length, length of head 2J times. 

 Snout longer than postocular part of head ; lower jaw projecting ; eye 

 If to If times in length of snout, 3f to 4 times in length of head, nearly 

 twice interorbital width ; mouth not extending to below anterior border 

 of eye ; 4 series of teeth in the upper jaw ; 7 series of scales on tlie 

 cheek. 12 or 13 gill-rakers on lower part of anterior arch. Dorsal 

 XV-XVI 11-12 ; spines subequal, f length of head ; longest soft rays 

 f length of head. Anal III 14 ; spines slender, third as long as dorsals. 

 Pectoral about f length of head, extending to vertical of origin of anal. 



* 10-174-19 = 35-36 in B. fero.v, 16 + 20 = 36 in B. mi.iot: 



