CAPRELLIDAE OF WESTERN NORTH ATL.\NTIC 



67 



Abdomen with 2 pairs of small iiniarticulate appendages and pair 

 of nonsetose lobes, posterior appendage pair with hooked seta at 

 tip, anterior appendage pair pyriform with seta at tapered tip. 



Female allotype: Body smooth. Length 4.4 mm. 



Antenna 1 approximately length of body, flagellum of 7 articles. 

 Antenna 2 extending slightly beyond articles 1 and 2 of antenna 1, 

 flagellum of 4 articles. 



jMouthparts as in male except setal formula for terminal article 

 of mandibular palp 1-1-1. 



Gnathopod 1 similar to male. Propodus of gnathopod 2 similar to 

 male except without elevations on distal part. 



Gills as in male. 



Pereopods as in male. 



Abdomen with pair of uniarticulate appendages and pair of lobes. 



Variation. — The setal formula for the terminal article of the man- 

 dibular palp varies from 1-1 to 1-2-1. The number of articles in the 

 flagellum of antenna 1 varies from 6 to 11 and in antenna 2 from 2 to 

 4. Pereopods 3 and 4 occasionally have 3 grasping spines instead of 

 the usual 2. 



Figure 32. — a and h, Paracaprella pusilla, large male; a, pereoniies 1 and 2; b, dactylus of 

 gnathopod 2; c-e, Hemiproto wigleyi; c, abdomen of female allotype; d, gnathopod 2 of male 

 holotype; e, gnathopod 2 of female allotype. 



