PLATE IV. 



Fig. 17. Alp keus lepidus de Man. Small cheliped of the larger female, looked at from the inner side, 



X 17 (the leg is lying somewhat obliquely, so that the merus and the chela appear a trifle 

 less broad). 



Fig. iS — 18£. Alplieus euchirus Dana. Ova-bearing female from the north coast of Sumatra. — 18 Frontal 

 and antennal region, X 8; iSa the same looked at laterally, X 8; 18^ peraeopod of the 

 3'd pair, >< 6. 



Fig. 19 — igf. Processa aequimana (Paulson). All the figures are taken from the specimen, long 14,7 mm., 

 which is supposed to be a male, excepting 19c vvhich is the telson of an egg-bearing female. — 

 19 rostrum, eye-peduncles etc, viewed from above, X 33; 19^ rostrum etc, viewed from 

 above, X 50, a peduncle of the right eye ; 19^ lateral view of rostrum, X 50; 19c telson 

 of the female, X 50 (here the distance betvveen the anterior pair of spinules and the base 

 measures only one-sixth the length of the telson); 19^ right, 19^ left leg of ist pair, X SO; 

 io^/" carpus and chela of the right leg of 2 Dd pair, X 50. 



Fig. 20 — 20b. Enoplometopus longirostris de Man. — 20 2' ld pleopod, X 50 ; 20a extremity of stylamblys 

 of this pleopod, X 320 ; 20b stylamblys of yd pleopod, X 50. 



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