94 Annals of the Carnegie Museum. 



Psectrogaster ciliatus (Miiller & Troschel). The character of the 

 scales is sufficiently shown in Plate XXIII. 



Psectrogaster curviventris Eigenmann & Kennedy. Scales broad, 3 

 mm. in diameter or rather more, strongly emarginate or biplicate 

 basally; nucleus slightly below the centre, a broad granular nuclear 

 area in some scales, in others it is circulate practically to the middle; 

 circuli very strong and regular; basal circidi minutely beaded; radii 

 apical only, confined to a couple of parallel rather faint lines (comet- 

 orbit style); upper half of apical field free from circuli, lower half 

 with transverse, not-angled circuli; apical margin very coarsely 

 dentate, the teeth sharp, broad at base. Faint lines show that the 

 marginal teeth have the same origin and character as those of 

 Citharid'.iim. One scale shows a parasite. 

 The principal differences between these scales and those of P. 



ciliatus, already described, seem to be due to the immaturity of the 



latter. 



Curimatopsis macrolepis Steindachner. The scales have distinct 

 laterobasal angles, and in general closely resemble those of Curi- 

 matus spilurus. The dermal pigment-spots are as in C. spilurns. 

 The scales are not ctenoid. 



Curimatus spilurus Giinther. The characters are well shown in Plate 

 XXV, figures 2 and 4. The scale of this younger specimen is 

 from Rockstone. 



Curimatus microcephalus Eigenmann & Eigenmann. A lateral line 

 scale is shown in Plate XXV, fig. 5. 



Curimatus moraivhannce Eigenmann. Scales like those of C. spilurus. 



Curiviatus schomburgkU Giinther. Scales of the Curimatine type, 

 the circuli rather coarse. The laterobasal angles are evanescent, 

 broadly rounded much as in P. ciliatus, not evident and produced 

 as in C. spilurus, etc. The apical margin also has a few broad wave- 

 like teeth, as in P. ciliatus. C. schomburgkU, when compared with C. 

 spilurus, microcephalus, etc., is a different-looking fish, with pro- 

 portionately much smaller scales, which are brilliantly silvery, 

 with hardly any radii. In C. spilurus and microcephalus the radii 

 are very distinct. A young C. spilurus (Plate XXV, fig. 2) has 

 shining scales which closely resemble those of C. microcephalus, 

 while an older one (Plate XXV, fig. 4), though having the char- 

 acteristic caudal spot, has duller scales with more radii. The older 

 fish is altogether more heavily pigmented, with a strongly dusky 

 caudal fin. 



