CAPRELLIDAE OF WESTERN NORTH ATLANTIC 



49 



Figure 2\.^Caprella septentrionalis, male variant; a, lateral view; b, giiathopod 2; c, 



gnathopod 1. 



Caprella unica Mayer, 1903 



Figures 23, 24, 55 



Caprella unica Mayer, 1903, p. 127, pi. 5, fig. 39. — M. Rathbun, 1905, pp. 7, 79. 

 Caprella grahami Wigley and Shave, 1966, pp. 289-296, figs. 1-5. 



Diagnosis. — Cephalon without anteriorly directed triangular pro- 

 jection, propodus of pereopods 5-7 with few setae but without grasping 

 spines. 



Description. — Body smooth to spiny. Length of largest male 18 

 mm, largest female 8 mm, smallest ovigerous female 5 mm. 



Peduncle of antenna 1 with or without dense setules in male, 

 female lacking setules. 



Mouthparts typical of genus except dactylus of maxillipcd pal[) 

 quite robust, right lacinia mobilis 5-toothed. 



Propodus of gnathopod 1 with 2 proximal gi*asping spines. Gnatho- 

 l)od 2 similar to C. linearis and C. sejytentnonalis. 



Propodus of pereopods 5-7 without grasping spines and with only 

 few short setae. 



Abdomen typical of genus. 



