50 ALLAN HANCOCK. PACIFIC EXPEDITIONS VOL. 27 



Plate 1+ 



Figure 1. Microarcturus tanner ensis, new species. 2. Uropod (Valve). 

 3. Mandible. 4. Maxilliped. 5. First Maxilla. 6. Second Maxilla. 

 7. First Antenna. 8. Seventh Peraeopod. 9. F'irst Peraeopod. 10. 

 First Male Pleopods. 



