. Allan Hancock Pacific expeditions. [Reports]. Scientific expeditions. 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 pre
. Allan Hancock Pacific expeditions. [Reports]. Scientific expeditions. 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
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