254 



LEON J. COLE. 



more, on the dorsal side near the base, the single spine of the 

 primary dactyl (SpDL) is represented by two similar spines 

 {SpD'R and SpD'L). The row of spines down the dorsal ridge 

 of the extra propodite is very weak, whereas there is a row of 

 strong spines in the corresponding position on the normal propo- 

 dite (FrL). This is a result of the "compounding" at this level, 

 to be mentioned again below (p. 264). 



Fig. I. Photograph of abnormal cheliped from dorsal side, 

 of abbreviations used in the figures see list on p. 267.) 



(For explanation 



The distance between the tips of the two diverging extra dac- 

 tyls (D'R and D' L) is very slightly greater than that between the 

 tips of the two extra indices {I'R and I'L), so that if the double 

 dactyl closed down squarely it would tend to make the tips lap 



