Plate 8. 



Figs. 38-40. Cbauliodus barbatus Garman. 



Fig. 38. The fish seen from the side. Drawing; natural size, a, ventroanal compound 

 radiating organs ; al, anterior lateral compound radiating organs ; ao, anteor- 

 bital compound radiating organs ; Ba, simple radiating organs with pigment 

 sheath in the barbel ; ml, medial lateral compound radiating organs; so, subor- 

 bital compound radiating organ ; ve, ventromedial compound radiating organs; 

 vt, ventrothoracic compound radiating organs; x, simple radiating organs 

 with pigment sheath on the side of the head. 



Fig. 39. The fish seen from below. Drawing ; natural size, a, ventroanal compound 

 radiating organs; al, anterior lateral compound radiating organs; Ba, sim- 

 ple radiating organs with pigment sheath in the barbel; g, guttural compound 

 radiating organs; ml, medial lateral compound radiating organs; u, groups of 

 simple radiating organs Avithout pigment sheath ; vc, ventromedial compound 

 radiating organs ; vt, ventrothoracic compound radiating organs. 



Fig. 40. The lower jaw seen from below. Drawing ; magnified 1:2; Ba, simple radiating 

 organs with pigment sheath in the barbel. 



Figs. 41, 42. Idiacanthus antrostomus Gilbert. 



Fig. 41. The fish seen fi'om the side. Drawing; natural size, a, ventroanal radiating 

 organs with pigment sheath ; al, anterior lateral radiating organs with pigment 

 sheath; ml, medial lateral radiating organs with pigment sheath; pi, posterior 

 lateral radiating organs with pigment sheath ; so, suborbital radiating organ 

 with pigment sheath ; u, suborbital group of small radiating organs without 

 pigment sheath ; ve, ventromedial radiating organs with pigment sheath ; vt, 

 ventrothoracic radiating organs with pigment sheath. 



Fig. 42. Tlie fish seen from below. Drawing ; natural size, a, ventroanal radiating organs 

 with pigment sheath ; g, guttural radiating organs with pigment sheath ; ve, 

 ventromedial radiating organs with pigment sheath ; vt, ventrothoracic radiating 

 organs with pigment sheath. 



