CAPRELLIDAE OF WESTERN NORTH ATLANTIC 79 



Description. — Male holotype: Body smooth except for pair of 

 small dorsal humps above insertion of gnathopods 2. Length 7 mm. 



Antenna 1 longer than body length, flagellum broken. Antenna 2 

 approximately length of first 2 articles of peduncle of antenna 1. 



Mandibular palp 3-segmented, setal formula for terminal article 

 1-10-1-1. Left mandible with 5-toothed incisor, 5-toothed lacinia 

 mobilis, setal row of 3 serrate setae. Eight mandible with 5-toothed 

 incisor, lacinia mobilis toothed but not distinctly 5-toothed, setal row 

 of 3 serrate setae, molar with large tooth on incisor side. Palp of maxilla 

 1 with 6 apical spines and 2 setae, outer lobe with 4 serrate spines and 

 3 nonserrate spines. Outer and inner lobes of maxilla 2 with 7 apical 

 setae. Outer lobe of maxilhped with 3 apical setae and 2 setae in notch 

 at midlength of medial margin, medial and lateral margins with nu- 

 merous setules; inner lobe with 4 plumose and 2 nonplumose apical 

 setae; palp with distal serrations. 



Propodus of gnathopod 1 triangular with single grasping spine, 

 grasping margins of dactylus and propodus serrate. Propodus of gna- 

 thopod 2 with proximal grasping spine and notch at midlength with 

 shghtly proximal tooth, palm moderately setose; basis approximately 

 length of pereonite 2. 



Gills elliptical. 



Pereopods 3 and 4 approximately one-fourth length of gills with 

 5 or 6 apical setae. Pereopods 5-7 missing. 



Abdomen mth pair of appendages bearing fringe of setae and 

 papillae at tip and with distinct pair of lobes bearing single seta. 



Female allotype: Body as in male. Length 4.5 mm. 



Antenna 1 longer than body, flagellum of 12 articles. Antenna 2 

 approximately length of peduncle of antenna 1. 



Mouthparts as in male except palp of maxilla 1 with 4 apical spines 

 and 4 setae, inner lobe of maxilliped vnih 4 plumose and 1 nonplumose 

 setae, and outer lobe of maxilliped with 2 apical setae. 



Gnathopod 1 similar to male. Propodus of gnathopod 2 wnth prox- 

 imal grasping spine, palm without notch. 



Gills as in male. 



Pereopods as in male. 



Abdomen with pair of lobes, each with 1 seta. 



Variation.- — In smaller individuals antenna 1 is much shorter than 

 the body length and antenna 2 is as long as the peduncle of antenna 1 . 

 The setal formula for the terminal article of the mandibular palp 

 varies from 1-2-1-1 to 1-12-1-1. The apical setae on the outer lobe 

 of the maxilliped varies from 1 to 3 and on Ihe inner lobe the number 

 of nonplumose apical setae may be 1 or 2. 



DisTRiRUTiON.— Type-locality: Magueyez Canal, La Parguera, 

 Puerto Rico, net haul close to bottom, Feb. 22, 1959, 1 male holotype 



