22 (21) Caudal appendage a long, slender, sharp-tipped spike . Batillipes camonensis 



22 {21) Caudal appendage, a short, thick, blunt-tipped spike Batillipes similis 



23 {16) Caudal appendage two-spiked Batillipes dicrocercus 



23 {16) Caudal appendage bears three or more spikes 24 



10 



