202 Ui\ C. T. Regan on llie Clupeld Fishes 



Pcecilothrissi congica, sp. n. 

 Pellonula vorax (part.), Bouleng. Cat. Afr. Fish. i. p. 156 (1909). 



De|.tl) of bo'ly 4 in the length, length of head 4^. Snout 

 a little .shorter than diameter of eye, which is 2| in length of 

 head ; jaws equal anteriorly ; maxillary extending to vertical 

 from anterior edge of eye ; maxillary teeth quite distinct ; 

 19 gill-rakers on lower part of anterior arch. 33 scales in a 

 longitudinal series, 8 in a transverse series ; ventral scutes 

 11-12 + 9-10. Dorsal 13; origin equidistant from end of 

 snout and base of caudal. Anal 2()-21. Pelvics well in 

 advance of dorsal. Caudal peduncle longer than deep. 

 Lateral band narrow, present only on posterior half of fish. 

 VertebrjB 43. 



Oongo. 



Two s})ecimens, 55 and GO mm. in total length, from 

 Coquilhatville and from Monsembe. 



3. MiCKOTiiRisSA, Bouleng. 1902. 



Ann. Mus. Congo, Zool. ii. p. 26. 



Scarcely generically distinct from Pellonula, but tongue 

 toothless, dorsal fin of 12-14 rays and anal of 21 to 25, and 

 pelvics in advance of dorsal. Scales 38-42/10-12. Ver- 

 tebrae 39-40. 



1. Microthrissa parva, sp. n. 

 Pellonula vorax (part.), Bouleng. Cat. Afr. Fish. i. p. 156 (1909). 



Depth of body 4 to 5 in the length, length of head about 4. 

 Snout a little shorter than diameter of eye, which is rather 

 more than ^ the length of head ; niaxillary extending to 

 vertical fron» anterior edge of eye ; lower jaw a little pro- 

 jectijig. 26 or 27 gill-rakei-s on lower part of anterior arch. 

 40 to 42 scales in a longitudinal series, 10 or 11 in a trans- 

 verse series; ventral scutes 12-13 + 7-8. Dorsal 12-14; 

 origin nearly equidistant from end of snout and base of 

 caudal. Anal 21-23, not extending forward to below dorsal, 

 pelvics in advance of dorsal. Caudal peduncle longer than 

 deep. 40 vertebrae. 



Upper Congo. 



Two specimens of 40 mm. from Coquilhatville and three 

 of 30 mm. from the Tumba Lake. 



