570 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



Plate 58 



Figure 1. Arenaeus mexicanus, male, dorsal view. After A. Milne Edwards. 



2. Arenaeus cribrarius, male (42451), carapace 107 mm. wide, ventral 



view showing outer surface of chelae. 



3. Arenaeiis cribrarius, male (4508), carapace 109 mm. wide, ventral 



view showing abdomen. 



Plate 59 

 Arenaeus cribrarius, male (42851), carapace 107.6 mm. wide, dorsal view 



Plate 60 

 Arenaeus cribrarius, male (42851), carapace 107.6 mm. wide, ventral view 



Plate 61 

 Arenaeus mexicanus, male (60975), carapace 87.5 mm. wide 



Figure 1. Front view showing chelipeds. 



2. Dorsal view. 



3. Ventral view. 



Plate 62 



Cronius ruber, male (48801), carapace 74 mm. wide, dorsal view 



Plate 63 



Cronius ruber, male (48801), carapace 74 mm. wide 



Figure 1. Ventral view showing outer surface of chelae. 

 2. Ventral view showing abdomen. 



Plate 64 

 Cronius tumidulus, male (14053), carapace 31 mm. wide 



Figure 1. Ventral view showing chelae. 



2. Dorsal view. 



3. Ventral view showing abdomen. 



Plate 65 



After A. Milne Edwards 



Figure 1. Euphylax dovii, west coast of America, carapace 59 mm. wide, dorsal 

 view. 



2. Same, fronto-orbital region, anterior view. 



3. Same, chela, outer side. 



After Stimpson 



4. Euphylax dovii, west coast of Central America, frontal region, fronto- 



orbital distance 57 mm. 



5. Same, outer maxilliped. 



Plate 66 



After A. Milne Edwards 



Euphylax robustus, Mazatlan, female, carapace 94 mm. wide, dorsal view 



