3 (12) Carapace with 1 supraorbital spine on each side; third maxilliped without exopod 



Lebbeus A 



A (13) Four prominent spines along middorsal line of carapace L. groenlandicus 



Figure 27. — Lebbeus groenlandicus; carapace, lateral view. 



A (13) No more than 2 spines along dorsal line of carapace B 



B (A) Rostrum long, tip exceeding proximal article of antennular peduncle in juveniles 



and entire peduncle in adults L. polaris 



Figure 28. — Lebbeus polaris; carapace and antennule. 

 lateral view of adult. 



B (A) Rostrum short, tip not exceeding proximal article of antennular peduncle (body 



conspicuously banded) L. zebra 



Figure 29. — Lebbeus zebra; carapace and antennule. 

 lateral view. 



11 



