184 



Proceedings of the Royal Irish Academy. 



Smaller specimens of C. labiatus gave clearer results, which can. be best 

 given in tabular form, the positions of the rings being taken from two or 

 more well-iuarked scales : — 



Length 











:N'o. of 











in cms. 











bands. 











(a) 39 



.. 192 



290 



32S 



354 1 373 



390 ca. 3 + 14 



8 



4 



2|1 



1 



(6) 37-7 



.. 159 



239 



308 



351 1 377 



ca. 3 -!- 14 



7 



4 



3|2 



1 



(c) 281 



.. 172 



241 



281 





e^. 4 + 9 



8 



3 



2 





(<f) 26-6 

 (e) 26-6 



.. 185 

 .. 170 



[ 266 

 218 



266 





'. obscure 



> 











(/) 25-8 



.. 160 



258 







ca. + 8 



9 



4 







(g) 25 -5 



.. 188 



229 



255 





ea.2H-ll 



6 



4 



3 





(/i) 250 



.. 152 



229 



250 





ca.5 + 8 



8 



'i 



1 





(i) 23-8 



.. 180 



203 



238 





ca. 4 + 10 



9 



3, 



2 





(K) 23-8 



.. 172 



205 



238 





obscure 











(0 221 



.. 192 



221 







ca. 3 + 7 



9 



1 







(m)21-8 



.. 191 



218 







ca. 3 + 8 



9 



2 







(m) 19-7 



.. 165 



197 







S 



7 



1 







Lioniirus aeqiialis (PI. VII, fig. 5). 



The rings in this species are very faintly marked. In some specimens 

 there was no sign of rings on any of the scales examined, and in others the 

 rings could ouly be traced in a very small proportion of scales. 



The following examples may be quoted : — 



Length 



in cms. 

 (a) 32-2 

 (6) 31-5 

 (c) 31-5 





No. of 







bands. 





322 



ca. 2 + 13 



6|4|3 



315 



ca. 4 -^ 12 



obscure 





ca.3-12 



11 i 2 i 2 



(d) 24-0 



ca.4-^8 



10 I 2 



. 169 I 240 I 287 

 . 194 I 231 I 282 

 . 210 I 267 I 315 



(one scale only) 



197 i 240 



These figures give an appearance of uniformity, but it is only by rejection 

 of a good many scales which gave doubtful readings tliat they have been 

 arrived at. One specimen in addition to the above gave the following residts 

 from a number of scales taken from between the first dorsal and the vent. 

 3 scales above 1.1. 



2 scales from LI. 



5 scales below U. 



142 

 This arrangement could be accounted for by suppo.sing that growth periods 

 were indicated at 142 and 201 mms. with an occasional intercalated ring 

 at IS^J mms. 



187 



206 



238 



187 



210 



238 



146 



200 



238 



138 



198 



238 





197 



238 





201 



238 





197 



238 





207 



238 



176 



194 



238 



