PLATE II. 



Fig. i. Semionotus fultus (Ag.). Dorsal fin. 

 " 2. " " Pectoral fin. 



3- Anterior flank scales. 



4- Posterior flank scales. 



" 5. Semionotus agassizii (W. C. Redf.). Scales from the twelfth longi- 

 tudinal row, a little below the lateral line. 



" 6. Semionotus micropterus (Newb.). Pectoral fin. 



7- Anterior flank scales. 



8. Posterior flank scales. 



" 9. Semionotus agassizii (W. C. Redf.). Posterior flank scales show- 

 ing "pegs." 



" 10. Semionotus agassizii (W. C. Redf.). Hindermost scale of anterior 

 dorsal ridge. 



" 11. Semionotus micropterus (Newb.). Hindermost scale of anterior 

 dorsal ridge. 



" 12. Semionotus agassizii (W. C. Redf.). Scales of the seventh and 

 eighth longitudinal rows, immediately below the lateral line. 



" 13. Semionotus micropterus (Newb.) Dorsal fin. 



All the figures of Plate II. are of twice the natural size, and drawn by Dr. 

 G. F. Eaton from specimens belonging to the Yale Museum. (See American 

 Journal of Science, vol. xv., April, J003.) 



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