. Allan Hancock Pacific expeditions. [Reports]. Scientific expeditions. NO. 1 BARNARD: AMPHIPODA OF THE FAMILY AMPELISCIDAE 43 several problems concerning this species. The materials at hand differ from the figures of this species in Sars (1895) by the longer article 7 of peraeopods 1 and 2. Holmes (1905) has noticed a variability in this feature, but it appears to be rather constant in the present specimens. Distribution: Widely distributed in the Channel Islands and along the coast of southern California, 16 to 115 fms; off 10 Mile Creek, south of Winchester Bay, Oregon, 20 to 40 fms; northe
. Allan Hancock Pacific expeditions. [Reports]. Scientific expeditions. NO. 1 BARNARD: AMPHIPODA OF THE FAMILY AMPELISCIDAE 43 several problems concerning this species. The materials at hand differ from the figures of this species in Sars (1895) by the longer article 7 of peraeopods 1 and 2. Holmes (1905) has noticed a variability in this feature, but it appears to be rather constant in the present specimens. Distribution: Widely distributed in the Channel Islands and along the coast of southern California, 16 to 115 fms; off 10 Mile Creek, south of Winchester Bay, Oregon, 20 to 40 fms; northeast of Middle Farallon Island, 37 fms; 4 miles north of Todos Santos Island, Lower California, 41 fms. Ampelisca indentata, new species Plate 30 Descriptor, of female: Head about as long as first 2 body segments, front margin slightly concave, lower front margin deeply incised and containing lower pair of eyes. Upper pair of eyes behind upper edge of antenna 1. Antenna 1 reaching end of peduncle of antenna 2; article 1 of pe- duncle almost as long as article 2, article 3 about half as long as 1. Antenna 2 nearly as long as body or somewhat shorter; article 5 of peduncle four fifths as long as 4. Mandible: spine row with 8 spines; article 3 of palp two thirds as long as article 2; the latter article rather stout. Maxilla 1: outer plate with 9 to 10 spines; palp article 2 narrower than outer plate, apex armed with 4 spines and 3 cusp teeth. Maxilliped: inner plate rather slender, reaching to end of palp ar- ticle 1, apex with a single chisel tooth; outer plate reaching to end of palp article 2, inner edge lined with 7 chisel teeth, rounded apex with 5 setal spines, the outer 2 plumose. Coxae 1 and 2: lower posterior angle slit; coxa 3 without slit. Gnathopod 1: article 6 about as long as 5, posterior edge strongly inflated and armed with spines and setae; article 7 short, stout. Gnathopod 2: article 6 about half as long as 5, article 7 about half as long as 5. Peraeopod 1 similar
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Photo credit: © Library Book Collection / Alamy / Afripics
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Keywords: ., bookcentury1900, bookcollectio, booksubjectscientificexpeditions
