MancJiester Memoirs, Vol. Ivi. (191 2), No. %. 



III. Intensive Study of the Scales of three Specimens 



of Sabno salar. 



By Philippa C. Esdaile, M.Sc, 



Honorary Research Fellow in Zoology, Universi/y of I\Iaiiihester. 

 (Cotnmi/i;icakd by Professor S. J. Hickso/t, D.St:, F.R.S.) 



CONTENTS. 



PAGE 



1. Introduction ... ... ... ,. ... i 



2. Definition of terms ... ... ... ... 3 



3. Method of selecting scales and mode of 



measurement and enumeration ... ... 4 



4. Results and conclusions of the examination of 



the scales from different regions of three fish 6 



General conclusions ... ... ... ... 11 



Summary ... ... ... .. ... ... 13 



Tables i to 4, recording the results ... ... 16 



Graphs i to 4 ... ... ... ... ... 18 



References .. ... ... ... ... ... 20 



Plate showing the parts of the scale referred to 

 in the definition of terms 



II. Diagrams i to 5, showing the positions from 

 which scales have been taken, the peronidia, 

 long axis, etc. ; and a comparison of scales 

 from different regions of the fish. 



February i6th, igi2. 



