PLATE IV 



Centrosgyllium nigrum Garm. Page 28 



Pig. 1. Skull as seen from the left side. 



Fig. 2. Skull as it appears when viewed from above 



Fig. 3. Outlines of the head from the upper side. 



*t . 



Figo 4. Outlines of the head from beneath. 



Fig. 5. A tooth from the forward portion of the upper jaw, 



Fig. 6. One of the teeth from the lower jaw. 



Fig. 7. Scales from the upper portion of the mid flank. 



