THE TVVAITE SHAD 137 



Students of the biology of our two species of 

 Shad should consult an interesting memoir by 

 P. P. C. Hoek, entitled '' Neure Lachs — und Maifisch 

 — Studien," published in Tijdschr. Nederl. Dierk. 

 Vereen. (2), vi. Leiden, 1900. , 



