ii8 COMMON TROUT. 



S. fario ausonii. — Dorsal 13 ( — 14.) 

 Pectoral 13. 

 Ventral 9. 

 Anal 10 — II. 



The pyloric c»ca are 3S— 47 (—51.) Vertebra; 57, counting the last rudimentary caudal, 58. 

 The specimen which afforded the illustration was taken in the Trout streams at Driffield. 



