Fishes from Lake Tanganyika. 367 



Chrysichthys grandis. 



Depth of body 4 to 4| times iu total leugth, length of 

 head 3 to 3^ times. Head much flattened, as long as broad, 

 smooth ; occipital process in contact with interneural shield ; 

 snout broadly rounded, projecting very feebly beyond mouth; 

 eye 8^ to 10 times in length of head and 3§ to 5 times in 

 interocular width ; width of mouth 1^ times in length of 

 head; band of premaxillary teeth feebly curved, 7| to 8 

 times as long as broad ; vomero-pterygoid teeth in a long 

 and ratlier broad band narrowly interrupted in the middle. 

 Nasal barbel 1^ to 1| times diameter of eye, maxillary 

 barbel ^ to f length of head^ outer mandibular \. Gill- 

 rakers moderately long, 11 or 12 on lower part of anterior 

 arch. Dorsal I Q, equally distant from end of snout and 

 from caudal; spine small, smooth, about ^ length of head. 

 Adipose dorsal twice as long as deep, as long as or a little 

 shorter than rayed dorsal, from which it is separated by a 

 space 2^ to 3 times its length. Anal IV 8. Pectoral spine 

 ^ to ^ length of head, feebly serrated on inner side. Caudal 

 notched, with rounded lobes, longest rays about twice as 

 long as median. Caudal peduncle hardly 1^ times as long 

 as deep. Dark brown ; belly white. 



Total length 570 mm. 



Kilewa Bay. 



Near C. myriodun, Blgr., but head smooth, band of teeth 

 on the palate narrower on the sides, nasal barbel longer, 

 dorsal and pectoral spines shorter. 



Synodontis dhonti. 



Depth of body equal to leugth of head, 3^ times in total 

 length. Head 1;^ times as long as broad, Avith strong 

 granular asperities between and behind the eyes ; snout 

 obtusely pointed, a little longer than postocular part of head ; 

 eye supero-lateral, 9^ times in length of head, 3^ times iu 

 interorbital width ; lips moderately developed ; mandibular 

 teeth |- diameter of eye, 20 in number, forming a transverse 

 series. Maxillary barbel not margined, nearly ^ leugth of 

 head ; mandibular barbels Avith few and slender branches. 

 Nuchal shield tectiform and very rugose like the occiput, a 

 little longer than broad, with obtuse posterior pi'ocesses. 

 Humeral process rugose, granular, not keeled, twice as long 

 as broad, rounded. Dorsal 1 7 ; spine strong, finely striated, 

 serrated behmd. Adipose dorsal low, 5 times as long as 



