534 



MERISTIC VARIATION. 



[PART i. 



(c) Tiro c.rtrn i IK I ices arising from a normal index. 

 *823. This again is a fairly common form, though much less frequent 



JU 



LI 



R' 



II 



FIG. 189. I. Eight chela of Homarus americanus. R', L', right and left extra 

 indices not separated from each other. (After Faxon.) II. llomaritx I'ulguris, 

 ri^ht chela in Brit. Mus. III. //. ruli/nria, right chela bearing extra double index. 

 li ;md L', not separated. (After LUCAS, I.e.) 



R' 



Fm. 1HO. I. Left chela of Cun-iun* itio'ini*, indices only shewn, rf, place of 

 articulation of dactylopodite. In Coll. Kurg. Mus. II. A similar case in 

 lli'iii'irna iiiiii'rii-iiniis, nfti'r Faxon. /,, normal left index, li', L', extra right and 

 left indices. 



