404 NOTES AND MEMORANDA. 



unarmed in the adult, it is well armed in the young (e. g. Naucrates), 

 and it is frequently the case that the armature of this region is more 

 powerful in the young than in the adult. If pi'otective in function 

 it is easy to understand that the spines of the turbot would only 

 be required as long as the pelagic habit is maintained, but I think 

 it is not less probable that their significance is simply ancestral. — 

 E. W. L. H. 



ERRATUM. 



N. S., Vol. II, No. 3, p. 282. 



Under Gadus esmarkii, for " 30 to 50 fathoms cable " read " 30 to 50 fathoms 

 ca." (circa). 



