NO. 7 BARNARD: AMPELISCIDAE IN THE CARIBBEAN 5 



Ampelisca pacifica Holmes 



Ampelisca pacifica Holmes, 1908, Proc. U.S. Natl. Mus., vol. 35, no. 

 1654, pp. 511-513, figs. 20-22; Barnard, 1954, Allan Hancock Paci- 

 fic Expeds., vol. 18, no. 1, pp. 31-33, pis. 21-22. 



Material examined.— AA-2>9 ( 3 ) , A52-39 ( 1 ) . 



Distribution. — Caledonia Bay, Panama, 5-14 fms. 



Ampelisca parapanamensis, new species 

 (Plate 2) 



Description of female. — Head as long as first 3 body segments, lower 

 front edge subparallel to upper edge; anterior edge slightly incised, upper 

 pair of eyes behind upper edge of first antenna, lower pair at the lower 

 front corner of head. 



Antenna 1 reaching to end of peduncle of antenna 2, first 3 articles 

 successively slightly shorter. 



Antenna 2 about as long as first 7 body segments, article 5 of peduncle 

 two thirds as long as 4. 



Mandible: spine row with 8 spines, article 3 of palp two thirds as 

 long as 2. 



Maxilla 1 : outer plate with 10 spines, article 2 of palp as wide as 

 outer plate, apex armed with 5 spines, 4 cusps and 7 setae, outer edge 

 lined with 5 setae. 



Maxilliped : rounded apex of inner plate armed with 3 spine teeth 

 and several short setae, inner edge of outer plate with 10 spines, rounded 

 apex with 3 setal spines, the outermost one plumose. 



Lower posterior edge of coxa 1 with a strong tooth, coxae 2-3 lack a 

 tooth or slit. 



Gnathopod 1 : article 6 two thirds as long as 5, hind margin slightly 

 convex, article 7 one half as long as 6. 



Gnathopod 2: article 6 one half as long as 5, hind margin straight, 

 article 7 one half as long as 6. 



Peraeopod 1 : anterodistal end of article 4 slightly produced, article 7 

 as long as or slightly longer than 5 and 6 combined. 



