1849.] 1425 



EXPLANATION OF THE PLATES. 



Plate I. 

 Fig. 1. Crenidens sarissophorus. Natural size. 



2. Tooth of the anterior series, upper jaw. Magnified. 



3. Ditto of the posterior series, Ditto. Ditto. 



4. Vertical section. Natural size. 



Plate II. 

 Fig. 1 — 3. Macropodus pugnax. Natural size. 



2. Labyrinth. Natural size. 



3. Vertical section. Natural size. 



4. Macropodus pugnax, Var. Magnified. 



5. Trichopodus trichopterus. Labyrinth and branchi- 



ostegous rays. Natural size. 



Plate III. 

 Ch^etodon prjetextatus. Natural size. 



Plate IV. 

 Fig. 1. Acanthurus xanthopterus. Natural size. 



2. Vertical section. Natural size. 



3. Tooth. 



4. Scale. 



Plate V. 



Fig. I. Ophiurus baccidens. Dentition. Natural size. 



2. Ophiurus boro. Dentition. Natural size. 



3. Ophiurus grandoculis. Dentition. Magnified. 



4. Ophiurus breviceps. Dentition. Magnified. 



5. Mur^ena thyrsoidea. Dentition. Natural size. 

 6 — 7. Monopterus javanicus. Head. Natural size. 



8. Monopterus javanicus. Dentition. Natural size. 



Plate VI. 

 Fig. 1. Dalophis anceps. Natural size. 



2. Vertical section. Natural size. 



3. Dentition. Magnified. 



4. Head. Magnified. 



} Magnified. 



