MASTACEMBELUS. U5 



D. XXXII-XXXIII 80-83; A. Ill 85-88 ; 



no prseorbital or praeopercular spines . . 28. M. stappersii, Blgr., p. 137. 

 D. XXXI 95 ; A, HI 70 ; praeopercular spines 



present 29. M. trispinosus, Stdr., p. 137. 



B. 33 to 39 dorsal spines ; no prseorbital spine. 

 D. XXXIII-XXXV 85 ; A. II 85; no prae- 



opercular spine 30. M. tmniatus, Blgr., p. 138. 



D. XXXVI-XXXIX 50-GO ; A. II 50-00; 



one praeopercular spine 31. M. tanjanicce, Gthr., p. 138. 



III. Vent considerably nearer end of snout than caudal fin. 

 D. XXV-XXVIII 125-150 ; A. II 125-150; 



no prseorbital spine ; two praeopercular 



spines 32. M. longicauda, Blgr., p. 139. 



D. XXXI 150; A. II 150; a prseorbital and 



4 praeopercular spines 33. J/", greshojji, Blgr., p. 110. 



D. XXX-XXXI1I 100-120; A.I 115-130; 



no prseorbital or praeopercular spines . . 3-1. M. ophidium, Gtlir., p. 141. 



Fig. 68. 





Mastacembclus paucispinis. 

 Type (A. M. C). |. 



1. MASTACEMBELUS PAUCISPINIS. 



Bouleng. Ann. Mus. Congo, Zool. i. p. 55, pi. xxviii. fig. 3 (1899), and Poiss. Bass. 

 Congo, p. 492, pi. xxiv. fig. 1 (1901). 



Depth of body 10 times in total length, length of , head 5^ times. 

 Vent slightly nearer end of snout than caudal, its distance from bead 

 1| times length of latter. Snout 4 times as long as eye, ending in an 

 appendage which is a little longer than eye ; mouth not extending quite 

 to below anterior border of eye ; no prseorbital or prasopercular spines. 

 Dorsal VII 105; spines extremely short; distance between first spine 

 and head nearly ^ length of latter. Anal III 70 ; second spine longest. 

 Caudal rounded. Pectoral a little more than \ length of head. Scales 



i2 



