14 



whicli are not so distinct, wliich run straight from before backwards ; it is tlie rows of 

 the first kind which are counted. The number of these rows indicated by the letters 

 L.l. is not so absolutely certain as the number of fin-rays in a fin, for the rows of scales 

 are counted, from the commencement of the lateral line to the base of the tail, and as 

 the lateral line is actually continued to the very extremity of the tail, while the scales 

 diminish in size gradually at the base of the tail until they get so small that the rows 

 cannot be counted, there is, of course, no definite point where the counting ceases. 



