Biology of the Antarctic Seas XXII by Stephen D. Cairns

By Stephen D. Cairns

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Published by means of the yank Geophysical Union as a part of the Antarctic examine Series.

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6), USNM 256282; Sta. 5), USNM 258210. Diagnosis. Thelycumof female with 2 anteriorlydirected,apicallynotchedprojections on sevenththoracicstemite;eighth thoracicstemite with shallow anterior notch. Petasma of male with Distribution. 53 G. , 1987; Iwasaki and Nemoto, 1987a, b]. IwasakiandNemoto[1987a,b] placedG. gilchristi in a group of speciesfound in the Subtropicaland externallobedividedinto distallyacutelobules,inner longerthanouter;medianlobe divided into 2 slender diverging lobules; internal lobe distally acute; accessory lobewell developed, distallyrounded.

The first endoIxxialsegmentof the antenna and mandible has no setae. The exopodhas3 large setaein addition to 1 small seta. In outerlobe,sixthsetafrom proximalendexceptionally setae. The shapeof the mandibularblade was consistent large. Maxilla relatively short (Figure 27b). Six protopodallobesof maxilla with 2, 1, 2, 3, 2, 3 setae in all 11 femalesand 1 male foundin the studyand can, therefore, be considered the most reliable in order from proximal to distal. Maxilliped also relatively short(Figure 27c).

41ram)thanE. magnus foundin thepresent study but otherwiseseemsto agree in anatomical details with the latter. fungiferusSteuerandA. validus Scottaresynonyms of E. magnus. 31 and32 Augaptilus oblongus Sars,1905,p. 11. Oceansectorof the Antarctic (66ø07'S,58ø26'E). Euaugaptilus oblongus; Sars,1925,pp. 266-267, pl. --Sewell, 1947, pp. 218-219, fig. whetherthe specimenbelongsto this speciesor E. austrinus,n. , a closelyrelatedspeciesdescribed above. In the presentstudy,both E. magnusand E. austrinus,n.

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