C YPRINIFORMES 



383 



H. B. ; Clwca, C. and V. — Asia. Doras, Gthr. ; Ozydoras, Kner ; 

 Callomystax, Gthr. Glanidium, Liitk. ; Cetopsis, Ag. — America. 



Fig. 372. 



Section of Malaptei urus electricus, Gin., showing the electric organ, A. ]:, vascular layer : 

 E, adipose tissue ; G, muscles. (From Owen, Anatomy of Vertebrates, by permission.) 



[-de. 



Pleeostomits Commersonii, Val. A, piece of lepidotrich, enlarged. B, several scales, from 

 which the skin has been removed on the left. C, small piece of"' the surface of a scale, much 

 enlarged. D, section through a developing denticle of Hypostoma (D, after Hertwig), a.s 

 .smooth anterior region ; cl, denticle ; d.c, dentine cap ; en, enamel cap ; cp, epidermis ; l.e\ 

 lateral-line canal ; m, enamel organ ; p, pulp ; sc, scale ; s.f, segment of lepidotrich. 



Sub-Family Malapterurinae. Malapterurus, Lac. ; Africa ; with 

 a large electric organ (Figs. 371, 372) (Fritsch [141]). 



