EXPLANATION OF PLATES. 



Plate L 



Figure 1. Brevoortia tyrannus (p. 19), adult, 12 inches long, from "Wood's Holl, Mass. Drawn by H. L. 

 Todd. 



Plate H. 



Figure 2. Brevoortia tyrannus (p. 19), young, 8 inches long, from "Wood's Holl (No. 20,CG6 c). Drawn by 

 H. L. Todd. 



Plate UL 



Figure 3. Brevoortia tyrannus, suhsp. aurea (p. 21). Drawn by H. L. Todd, from a specimen in the 

 Museum of Comparative Zoology, Brazil. 



Plate I"V". 



Outlines showing the variations of Brevoortia tyrannus (p. 21): 

 Figure 4. Brevoortia tyrannus, subsp. menhaden, "Wood's Holl. 

 Figure 5. Brevoortia tyrannus, subsp. brevicaudata, Noank, Conn. 

 Figure 6. Brevoortia tyrannus, subsp. menhaden. Saint John's River, Fla» 

 Figure 7. Brevoortia tyrannus, subsp. aurea, BrazlL 



Plate V. 



Figure 8. Brevoortia patronus (p. 26), young? 8 inches long, from Brazos Santiago, Texas (892 a). Drawn 

 by K L. Todd. 



Plate "VX 



Figure 9. Brevoortia pectinata (p. 30). Drawn by H. L. Todd, from a specimen in the Museum of Com- 

 parative Zoology, Eio Grande, Brazil. 



Plate "VII. 



Figure 10. Brevoortia dorsalis (p. 37), west coast of Africa- Outline from Bleeker's Plate. 



Plate VIIL » 



Figure 11. Fac-simile of plate accompanying Latrobe's description of Clupea tyrannus and Oniscua 

 prcejustator, (p. 15), from Transactions of the American Philosophical Society, Vol. V, 1802, Plate L 



Plate IX. 



Figure 12. Map showing geographical distribution of the North American menhaden, the annual 

 movements of the schools, and the locations of the fishing-grounds and the oil-factories. 



Plate X, 



Parasites of the menhaden. Drawn by J. H. Emerton : 

 Figure 13. Head of fiah showing the position of the crustacean parasite (p. 102). 

 Figure 14. Oymothoa prcegustator (p. 101). 

 Figure 15. Lcemonema radiata (p. 104). 



Plate XL 



Figure 16. Map of the menhaden fishing-grounds of Maine (from.Maddocks' Report). 



Plate XEL 



Figure 17. Diagram of temperature strata in the Atlantic Ocean between New York and the Ber- 

 mudas, April 24 to May 8, 1873 (p. 66). Copied from the " Reports of Capt. G. S. Nares, R. N. (H. M. S. 

 Challenger), with abstract of soundings and diagrams of ocean temperatures in the North and South 

 Atlantic Oceans, 1873." 



Plate XIIL 



Figure 18. Diagram of temperature strata in the Atlantic Ocean between Halifax, Nova Scotia, and the> 

 Bermudas, (p. 66). From Coptaia Nares's Report. 



51& 



