PLATE XL 



Fig. 1. Pylocheles spinosus, n. sp., 



a. Frontal region, 



h. Under surface of thorax, 



c. Fourth left leg (from below and in front), 



d. Apex of fourth left leg (from above), 



e. Fifth left leg (from below and behind) 



Fig. 2. Petrolisthes serratus, n. sp., . 



a. Left external maxiUipede, 



Fig. 3. Petrolisthes unilohatus, n. sp., 

 a. Left external maxiUipede, 



Fig. 4. Pachyclieles harbatus, A. Milne-Edwards (?), 

 a. Left external maxUlipede, 



Fig. 5. Porcellana serratifrons, Stimpson, 



a. Left external maxiUipede, 



Fig. 6. Porcellana rohertsoni, n. sp., . 

 a. Left external maxiUipede, 



Fig. 7. Porcellana platycheles (Pennant), 



(Young specimen from MUlport, Firth of Clyde.) 



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