96 ZOOLOGISCHE MEDEDEELINGEN — DEEL VI. 



Merus of 2nd leg divided into 7 segments, dactylus with 25 segments, 

 those in the middle as long as broad or slightly longer than broad, chela 

 3-times as long as broad, fingers a little shorter than the palm. 



The three posterior legs thin and slender. Whereas in the 

 3rd and 4th pair the carpus is longer than the merus and 

 the propodus, in the 5th legs merus and propodus are 

 longer than the carpus. Ischium and merus of 3rd and 4th pair 

 spiniferous along their posterior margin, propodus of 5th legs with 

 3 spiniform setae along the distal half of its posterior margin; dactylus 

 of the three legs about one-fourth the propodus. 



Length 20 mm. (carapace, rostrum included, 6 mm. long, abdomen 

 14 mm.). 



EXPLANATION OF THE FIGURES. 



Fig. 4. Anterior extremity of the thoracic sternum of an adult male of Scyllarus 

 arctus (L.) long 115 mm., outer antennae included, from Rovigno, X 4. 



Fig. 2. Anterior extremity of the thoracic sternum of a young female of the 

 same species, long 34 mm., outer antennae included, from the Mediter- 

 ranean, X 16. 



