OVARIES TN TELEOSTEAN AND ELASMOBRANCH FISRES. 167 



In Table II tlie numbers of young, corresponding" to a 

 given length of parent, are compared in three localities. The 

 numbers for Ostend and Kiel are taken from the papers of 

 Bambeke (1888) and Stuhlmann (1887) respectively. Since 

 the breeding season apparently synchronises at these three 

 localities, the length measurements given are compai'able. 

 Well-mai-ked local and possibly racial differences in respect 

 of fecundity ai'e apparent on inspecting this table. The 

 average numbers of young', corresponding to a given length, 

 are roughly about double at Ostend what they are at St. 

 Andrews. 



Table III gives the numbers and sizes of the sexes in a 

 collection of adults, all of which were obtained at St. 

 Andrews. The results confirm A\'^illoughby's statement 

 (Couch, p. 240) that ^^ the males of this species are smaller in 

 number than the females and of inferior size." 



Table IV. 



In Table IV the proportion of males and females in each of 

 six broods is recorded. Females were in the majority in all 

 cases but one. 



Material, — The material for this work^ consisted chiefly 

 of post-embiyonic ovaries of Zoarces in all stages of develop- 



' The work on Zoarces was done at the Gatty Marine Laboratory, St. 

 Andrews, during my tenure of a Berry Science Scholarship of the University 



