PLATE Y. 



Centroscyllium nigrum Garm. Page 28. 



Fig. 1. 



Fig. 2. 



Inside of skull as seen in a longitudinal section. 



Branchial cartilages, viewed from below, including the Meckelian, the shoulder 

 girdle, the pectoral fin, and the extrabranchials of the right side. 



Fig. 3. Spiral intestine, intestinal caecum, kidneys, etc. 



Fig. 4. Shoulder girdle and cartilages of the pectoral fin 



Fi". 5. Cartilages of the ventral fin and the pelvis. 



Fig. 0. Heart, showing the valves in the hulbus. 



