234 



Mr. E. Sbann on the Life-history and 



obtuse curve. Teeth small, with only a slight swelling at 

 the base. Radial markings numerous. A scale of G. minutus 

 is depicted in PI. IX. fig. 4. Scales were obtained from 

 specimens 18 mm. and 19*5 mm., but none were found on 

 specimens 16-17 mm. In the young forms the concentric 

 rings are very clearly defined, but in the larger specimens 

 (50 mm. upwards) the rings are not so distinct, and many 

 are discontinuous, while the innermost are much contorted. 

 The following table will illustrate the fact that in this species 

 the number of rings on adjacent scales varies excessively, 

 nor is there any relationship between the size of a fish 

 and the average number of rings on scales taken from the 

 typical area. 



(5) Q . Jeffrey six. 



Scales large, under 30 in a longitudinal row, and 7 in 

 vertical. Broad and roughly rectangular : the long side on 

 which the teeth are placed shows a marked convexity, the 

 opposite side is considerably indented where the radial 

 markings reach the edge of the scale. The teeth rather large 

 and shaped like a retort, the points being directed inwards. 

 The radial markings are well developed, and, in the scale figured 

 in PL IX. fig. 7, can be divided into two distinct series. The 

 concentrics are clearly marked and evenly distributed. On a 

 scale of a CO mm. specimen there were 50 rings. 



