270 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 
Stations 7; 8; 34; 35; 42; 4700; 5301; 5320; Fiji Islands. Found 
at 2 Wilkes, 8 Monaco, and 26 Carnegie stations but not present in the 
Siboga plankton. This is the species named Afiracia gracilis by Dana, 
but Sars (1916, p. 13) recognized that it did not belong in that genus 
but was rather a true Setella. However, the type species of Setella 
already bore the name gracilis. Hence, if Dana’s species was to be 
transferred to the genus Seted/a its specific name had to be changed, 
so Sars called it Setella oculata, which later became the Macrosetella 
oculata of Rose (1929, p. 54) and subsequent authors. However, F. 
Dahl (1895, p. 171) stated that Dana’s species differed enough from 
the other Setellidae to warrant the establishment of a new genus for 
it, suggesting the name Oculosetella. Placing it in this hitherto un- 
recognized genus permits the retention of the specific name given to 
it by Dana. It is a rare species, and two specimens are usually the 
most obtained in a single tow, though at station 4700 four females 
and one male were captured. 
Genus OITHONA Baird, 1843 
OITHONA LINEARIS Giesbrecht 
Oithona linearis GiESBRECHT, Atti Accad. Lincei, Rome, ser. 4, vol. 7, sem. 1, p. 
475, 1891; Fauna und Flora des Golfes von Neapel, monogr. 19, pp. 538, 548, 
pl. 34, figs. 1, 2, 40, 1862. 
Stations 11; 23; 29; 46; 47; 52-55; 59; 61; 68; 64; 67; 3799; 5120; 
5209 ; 5246 ; 5263; 5820; 5848; 5399; 5437; Niuafu Island. Originally 
ebtained from the tropical Pacific by Giesbrecht and otherwise re- 
ported only in the Carnegie plankton list. Only a single specimen was 
obtained at most of these Albatross stations and the highest number 
was three, 
OITHONA PLUMIFERA Baird 
Oithona plumifera Barrp, Zoologist (Newman), vol. 1, p. 59, fig. b, 1843. 
Stations 4; 34; 43; 44; 75; 76; 4700; Fiji Islands. A single female 
was obtained at each of these stations except the last two, where collec- 
tions of from 30 to 50 specimens including both sexes were obtained. 
The species appears in all the plankton lists except the Challenger, but 
always in very small numbers. It seems to stay at or near the surface 
and is not likely to be found in a deep tow. 
OITHONA ROBUSTA Giesbrecht 
Oithona robusta GiEsBRECHT, Atti Accad. Lincei, Rome, ser. 4, vol. 7, sem. 1, p. 
475, 1891; Fauna und Flora des Golfes von Neapel, monogr. 19, pp. 538, 549, 
pl. 34, figs. 4, 5, 16, 17, 23, 30, 31, 43, 1892. 
Stations 2195; 2806; 3765; 4676. This species, originally described 
from the tropical Pacific, was taken once by the Carnegie a little east 
