MAST ACE M BELUS. 1 1 5 



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



no prreorbital or pvfeopercular spines . . 28. JV. stappersii, Blyr., p. 137. 

 D. XXXI 95 ; A, in 70 ; pi-feoperciiliir spines 



present 2d. M. trispinosus, Sidr., {k i'M. 



V>. 33 to 30 dorsal spines : no prjeorbital spine. 

 D. XXXIIT-XXXV 85 ; A. I[ 85; no pi-ic- 



0|iercu]ar spine iO. M. twidatus, Blgr., p. 138. 



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



one prpeoperciilai- spine 31. M. faufjaniat', (jthr., \). I'dS. 



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

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



no prseorbital si)ino ; two pra30[jercular 



spines 32. J/, longicauda, Blgr., p. 139. 



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



4 prseopercular s|)ines 33. .1/. greslinfji, Blgr., p. 110. 



I). XXX-XXXIII 100-120; A. I 115-130 ; 



no prpeorbilal or |)i£eo[)ercular sjiines . . 3-1. M. ophidium, Gtlir., p. 141. 



Eiff. (js. 



D¥*s:^zr.i^^^s 



Mastacenibelus pcmcispiids. 

 Type (A. M. C). |. 



1. MASTACEMBELUS PAUCISPINIS. 



Boideng. 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 5j times. 

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

 I^ 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 praeorbital or prseopercular spines. 

 ])orsa] 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 



