PLATE XII. 
1-3. Erichthoidina. 4. Lysioerichthus. 5. Gonerichthus. 6. Pseuderichthus. 
Fig. 1 . Erichthoidina ( Lysiosquilla ?), from Honolulu. Zeiss, A, 2. 
Fig. 2. Older stage of same. 
Fig. 3. Erichthoidina ( Gonodactylus f ), from St. Vincent, Cape Verde. Zeiss, A, 2. 
Fig. 4. Lysiosquilla ( Lysioerichthus ) minutus, from St. Vincent, Cape Verde. Stage No. 1; 
4 '16 mm. long. 
Fig. 5. Gonodactylus ( Gonerichthus ), from St. Vincent, Cape Verd. Zeiss, A, 2. 
Fig. 6. Pseudosquilla ( Pseuderichthus ), 1T4 inches long, collected between Tenerife and 
St. Thomas. 
