Holt and Calderwood — Report on the Rarer Fishes. 



465 



Dimensions. 



Proportions and Conformation. — Owing to the defectiveness of tlie caudal region 

 in most of the specimens the total length is not of much use in instituting 

 comparisons of their relative sizes. The length of the head forms a better basis, 

 or the distance between the tip of the snout and the commencement of the anal 

 fin. The anus, as we shall see later, is not sufficiently constant in position to 

 enable the pre-anal length to serve as the unit of measurement. Taking either of 

 the dimensions suggested into consideration, it appears that the series is fairly 

 representative of those sizes which fall within its limits. 



*- In specimens Z and A the caudal region is incomplete ; this is also the case in B, which, moreover, 

 possessed a false caudal fin. The caudal region appears to be complete in C and B. 

 \ Measured from insertion of inner ray of peMc fin to centre of vent. 

 X Position of vent perhaps somewhat distorted by the aversion of the ovaries. 



TEiNS. ROY. DUB., SOC. N.S. VOL. V., PART IX. 



3U 



