160 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 
negie plankton, and was recorded by Sewell (1929, p. 217) from the 
Indian Ocean. Two of Sars’ figures of specimens in the Albatross 
plankton are here reproduced and leave no doubt of the identity of 
the species. 
AMALLOTHRIX CURTICAUDA (A. Scott) 
Scolecithricella curticauda A. Scorr, Copepoda of the Siboga Expedition, monogr. 
29a, pt. 1, p. 94, pl. 30, figs. 1-9, 1909. 
Stations 4679; 4687. Established by Scott upon two females in the 
Siboga plankton as a new species of Scolecithricella and afterward 
transferred to Sars’ new genus Amallothria in the Monaco report. 
Sars identified the species from these two Albatross stations. 
AMALLOTHRIX EMARGINATA (Farran) 
PLATE 20, FIGURE 276 
Scolecithrix emarginata FarraAN, Ann. Rep. Fisheries, Ireland, 1902-03, pt. 2, 
app. 2, p. 36, pl. 7, figs. 6-17, 1905. 
Stations 71; 73; 75; 5120; 5287. Established by Farran as a new 
species of Scolecithriz in 1905 upon specimens from west of Ireland. 
Made a synonym of Scolecithricella obtusifrons by A. Scott in the 
Siboga plankton, but reestablished by Sars in the Monaco plankton 
and transferred to Amallothrix. The figure here given of the fifth 
legs corresponds with that published by Sars except that the distal 
joints are here distinctly separated, while the separation was only 
suggested by Sars. The species manifestly belongs in the present. 
genus and constitutes a separate and perfectly valid species. 
AMALLOTHRIX FALCIFER (Farran) 
PLATE 20, FIGURE 277 
Scolecithriz falcifer Farran, Journ. Linn. Soc. London, Zool., vol. 36, No. 243, 
p. 262, pl. 8, figs. 9-14, 1926. 
Stations 5263; 5437. Established by Farran as a new species of 
Scolecithrixv upon a single female taken in a vertical haul from a depth 
of 100 fathoms in the Bay of Biscay. Rose (1933, p. 155) transferred 
the species to the present genus, but Farran’s female still continued 
to be the only specimen known. ‘These two |A/batross stations yielded 
four more female specimens and constitute the first record from the 
Pacific. The small spine or tooth on the outer margin of the fifth 
leg, shown in plate 20, figure 277, and the rows of slender spinules on 
the first four pairs of legs are the distinguishing characters of the 
species. 
