Fig. 



1. Polyphemus pediculus. Swimming feet. 



2. Ofryoxus gracilis. First foot. 



Macrotbrix nova-mexicana. 



3. Female. 



4. End of post- abdomen. 



5. Autennule. 



6. Leydigia qiiadrangularis. First foot. 



Osphranticum labronectum. 



7. Anteunule. 



8. Fifth foot of female. 



