32 PROF. T. JEFFERY PARKER ON THE 



PLATE II. 

 Fi°\ 1. Head of Begalecus argenteus from the left side, with the snout protruded : 



showing the natural colours of the freshly captured fish. \ nat. size. 

 Fig. 2. The seventh ray of the crest, showing the fringing membrane (broken at a) 



and the terminal lobe. Nat. size. 

 Fig. 3. Terminal lobe of seventh ray, showing the termination in it of the bony 



ray. X 4. 

 Fig. 4. Transverse section through the body, near the middle (diagrammatic), showing 



the relation of the intermuscular septa to the skeleton and to the cutaneous 



ridges. ^ nat size. 



PLATE III. 



Fig. 5. Skeleton of Segalecus argenteus. -^ 6 nat. size. 



PLATE IV. 



Fig. 6. The skull, with the shoulder and hip-girdles, from the left side. ■§- nat. size. 



Fig. 7. The cranium from the left side. Nat. size. 



Fig. 8. The cranium from above. Nat. size. 



Fig. 9. The cranium from beneath. Nat. size. 



Fig. 10. The cranium from behind. Nat. size. 



Fig. 11. Longitudinal vertical section of the cranium with the periosteum in place. 



Nat. size. 

 Fi°\ 12. The same, with the periosteum removed. Nat. size. 



PLATE V. 



Fig. 13. The bones of the cranium, disarticulated. Nat. size. 



Fig. 14. The suspensorial apparatus with the lower jaw and opercular bones of the left 



side, seen from within. \ nat. size. 

 Fig. 15. The left suspensorial apparatus and hyoid cornu, seen from the outer side, the 



opercular bones being removed. ^ nat. size. 

 Fig. 16. The left hyoidean cornu, viewed from within. ^ nat. size. 

 Fig. 17. The branchial arches of the left side, with the copulee, seen from within : the 



posterior pharyngobranchials are somewhat displaced in order to bring the 



parts into one plane : most of the gill-rakers are supposed to be removed. 



Nat. size. 

 Fig. 18. The left shoulder-girdle, from within, the rays of the pectoral fin being 



removed. \ nat. size. 

 Fig. 19. The left innominate bone with the proximal end of the pelvic fin, seen from 



within. A nat. size. 



