NO. 1 BARNARD: AMPHIPODA OF THE FAMILY AMPELISCIDAE 9 



1 is not produced, uropod 1 is shortened, article 6 of peraeopod 5 is 

 shorter than article 5, and the lobe of article 2 of this appendage is 

 shaped differently. 



It is closely related to Ampelisca abyssicola Stebbing (1888) but 

 differs in the presence of a tooth on the lower posterior angle of pleon 

 segment 3, the longer first antennae, and the lack of a tooth on coxa 3. 



Ampelisca catalinensis is also closely related to A. coeca Holmes 

 but may be distinguished by the presence of teeth on the first two coxae, 

 by a more strongly produced tooth on the posterior edge of pleon seg- 

 ment 3, and by the more evenly rounded lower edge of the posterior 

 lobe of article 2 of peraeopod 5. It is possible that this species may be 

 a variety of Ampelisca coeca, but the relationships will have to be con- 

 firmed by more materials dredged from the deeper bottoms (250 to 350 

 fms) where these two species may be more frequently encountered. 



Distribution: The type locality. 



Ampelisca milleri, new species 

 Plates 3 and 4 



Description of female: Head not quite as long as first 3 body seg- 

 ments, anterior edge broadly incised, lower front margin oblique, con- 

 cave. Eyes small, upper pair behind upper edge of antenna 1, lower 

 pair below lateral angle of head. 



Antenna 1 reaching well beyond end of peduncle of antenna 2; 

 article 1 of peduncle stout, elongated; article 2 one and one-half times 

 as long as 1 ; article 3 about one third as long as 1. 



Antenna 2: flagellum broken, peduncle strongly setose, articles 4 

 and 5 of peduncle subequal in length. 



Mandible: spine row with 10 spines, article 2 of palp broadly ex- 

 panded, article 3 two thirds as long as 2. 



Maxilla 1: outer plate armed with 10 spines; palp article 2 more 

 slender than outer plate, armed apically with 4 spines, 3 cusp teeth, and 

 15 to 18 setae. 



Maxilliped: inner plate reaching to end of palp article 1, armed 

 with 1 or 2 chisel teeth; outer plate reaching to end of palp article 2, 

 inner margin and apex armed with 11 or 12 spines, not chisel shaped, 

 and 2 plumose setae. 



Gnathopod 1 moderately stout, setae strongly developed; posterior 

 edge of article 6 slightly convex ; article 7 about two thirds as long as 6. 



Gnathopod 2: articles 4 to 6 not greatly elongated; article 6 , 

 half as long as 5 ; article 7 very short and stout. /\ 



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