﻿Variation in the Norway Lohster. 



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were noted. While not a single Nejphro^s was found in 

 the small-mesh net in the case of Lot D, yet in Lot G 

 there were 585 specimens in the ordinary trawl and 145 

 in the small-mesh net. Thus the proportions are very 

 variable. 



Other particulars are apparent from an examination of 

 Table III. At times it was not possible to examine all 

 the specimens brought on board, and in such cases a 

 rough estimate is given of the proportion examined. In 

 a number of cases the temperature of the water, which 

 varied, according to the season of the year, from 6° C. to 

 12° C, was noted both at the bottom and at the surface. 

 The nature of the ground on which Nephrons is found is 

 also occasionally indicated, and it appears to be, in general^ 

 of a muddy character. The depth varied from about 12 

 to over 70 fathoms, the average depth being about 30 

 fathoms. The date of capture of each lot is also given, as 

 well as the locality where each haul was taken. Special 

 attention is directed to the seventh haul of Lot A and to 

 the second haul of Lot C, for in those cases, instead of the 

 ordinary trawl, there was used a small trawl with a 

 30-foot head-line, having only a small mesh, this being 

 very similar to the small-mesh net already referred to. 



It is worthy of note that of the large number of specimens 

 examined, only one had recently moulted, while only eleven 

 females were found bearing ova. 



1. On the Relative Size of Males and Females. 



This is dealt with in Table L, which is self-explanatory. 

 Measurements of length are there recorded for 5165 

 specimens. Those measurements, which were taken from 

 the tip of the rostrum to the end of the telson while the 

 animal was placed, with its back downwards, on a graduated 

 board, are given to the nearest centimetre. The Table shows 

 readily the number of individuals, arranged according to sex, 

 of any particular length in the various lots examined. The 

 most obvious fact is that the females are considerably less in 

 length than the males. I was prepared for this difference in 



