U.S. NATI 
ONAL MUSEUM BULLETIN 100, VOL. 14, PART 4 PLATE 20 
SPECIES OF ACARTIA, AMALLOPHORA, AMALLOTHRIX, ARIETELLUS, AND CALANOPIA. 
267-269, Acartia laxa Dana: 267, Dorsal view, male; 268, fifth leg, female; 269, fifth leg, male. 
271-274, Acartia tumida Willey: 271, Dorsal view, female; 272, dorsal view, male; 273, fifth 
legs, female; 274, fifth legs, male. 
275, Amallophora typica T. Scott, female: Fifth legs. 
276, Amallothrix emarginata (Farran), female: Fifth legs. 
277, Amallothrix falcifer (Farran), female: Fifth legs. 
278, Amallothrix lobata (Sars), female: Fifth legs. 
279, Amallothrix propinqua (Sars), female: Fifth legs. 
280, Arietellus aculeatus (T. Scott), male: Fifth legs. 
281, Arietellus plumifer Sars, male; Fifth legs. 
282, Calanopia thompson A. Scott, male: Fifth legs. 
283, 284, Arietellus setosus Giebrecht; 283, Fifth legs, female; 284, fifth legs, male. 
