1908] - Decapod Crustaceans. 65 
extremely small, organ of copulation as in fig. 5 III. When the 
speeimens had an organ of the first kind, appendix masculina on 
the inner branch of the nd pleopod (see fig. 5, 1) was fully 
TE m 
Fig. 5. Pandalus annulicornis Leach. 
developed and of the same shape and with the same setose covering 
as in Pandalus borealis. On the other hand in specimens with an 
organ as in fig. 5 IIT appendiz masculina was as å rule either 
