EXPLANATION OF PLATES. 



Plate L 



Figure 1. JSrevoortia ij/mnnus (p. 19),adult,12 inches long, from Wood's Holl, Mass. Drawn by H. L. 

 Todd. 



Plate IL 



Figure 2, JDrevoortia tyranvus (p. 19), young, 8 inches long, from Wood's HoU ^3S'o. 20,CC6 c). Drawn by 

 H. L. Todd. 



Plate in. 



Figure 3. Brevoortia (yranmirS, subsp. aurea (p. 21). Drawn by H. L. Todci, from a speoimon in tha 

 Mnsenm of Comparative Zoology, BraziL 



Plate IV. 



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

 Figure 4. Brevoortia tyrannus, snbsi). menhaden, Wood's HolL 

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

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

 Figure 7. Brevoortia tyrannus, subsp. aurea, BraziL 



Plate Y. 



Figure 8. Brevoortia patronus (p. 26), young? 8 inches long, from Brazos Sa.itiigo, Texas (892 a). Drawi 

 by H. L. Todd. 



Plate VL 



Figuie 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 co.ast of Africa. Outline from Bleeker's PLite. 



Plate VIIL 



Figure 11. Fao-simUe of plate accompanying Latrobe's description of Olupea tyrannus and Oniicut 

 prcerjustntor, (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. IL Emerton : 

 Figure 13. Ilead of fish showing the position of the crustacean parasite (p. 102?. 

 Figure 14. Oymothoa prcegustator (p. 101). 

 Figure 15. Lcemonema radiata (p. 104). 



Plate XL 



Figure IG. Map of the menhaden fishing- grounds of Maine (from Maddooks' Report). 



Plate Xn. 



Fi_2ure 17. Diagram of temperature strata in the Atlantic Ocean between Xew 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 tha 

 Bermudas, (p. 6G). From Captain Nares's Report, 



515 



