448 



DEPARTMENT OF TEE T^'ATAL fiERTICE 



Bay of Islands (No. 33 Station 54.) 



Lower Gulf. (Princess Station 25.) 



Lower Gulf. (Princess St.\tion 50.) 



So far as can be seen, the number of jaws is dependent upon the size, irrespective 

 of the degree of maturity. Only in the very largest individuals is there any indication 

 of the decrease in number that is so characteristic of certain other species. • 



The number of jaws is therefore proportional to the size, and becomes greater in 

 the colder water. 



The subspecies S. elegans haltica Ritter-.Zahony (1911, p. 18) differs from both 

 the typical and arctic subspecies in having a relatively shorter tail, that is, its tail 

 percentage (the percentage of the length of the tail in the total length) is less. It 

 seemed likely that this character would show differences characteristic for each region 

 and that the Lower Gulf specimens would approach the Baltic type. To test this, in 

 the first place a series of small individuals from 11 to 16.5 mm. long, taken in July 

 and August at different poins, were studied. There were none available from the Bay 

 of Fundy. The results were as follows : — • 



Bay of Islands (No. 33 Station 54). 



