COPEPODS GATHERED BY ALBATROSS—WILSON 155 
ACARTIA LONGIREMIS (Lilljeborg) 
Dias longiremis Linisenore, De crustaceis ex ordinis tribus: Cladocera, Ostracoda 
et Copepoda, in Scania occurrentibus, p. 181, pl. 24, figs. 1-15, 1853. 
Stations 15; 63; 75; 3782; 3799; 3829 ; 8834; 3867; 3878; 4010; 4190; 
4700; 4756; 4926; 5234; 5246; 5320; 5340; 5399; 5415; 5530; 5601; 
H. 1888; Beaver Harbor, Vancouver Island, British Columbia; 
Kodiak, Alaska; Sabtan Island, Philippine Islands. Confined to two 
stations in the Monaco plankton, to very few stations in the Carnegie 
plankton, and absent from the other lists. The species is a true 
pelagic form, as stated by Sars (1903, p. 150), but it is not wholly con- 
fined to the open ocean. Several of the tows in which it was captured 
were vertical hauls from 500, 300, and 100 fathoms to the surface. 
ACARTIA NEGLIGENS Dans 
Acartia negligens Dana, Proc. Amer. Acad. Arts and Sci., vol. 2, p. 26, 1849; 
United States Exploring Expedition, 1838-42 (Wilkes), vol. 14, pt. 2, 
Crustacea, p. 1121, 1853; pl. 79, fig. 3 a-c, 1855. 
Stations 3; 9; 66; 70; 71; 76; 77; 3829; 8878; 3932; 4664; 5175; 5176; 
5186; 5225; 5230; 5233; 5262; 5263; 5301; 5338; 5340; 5349; 5410; 
5411; Fiji Islands. One of Dana’s species originally obtained among 
the Kingsmill Islands just north of the Equator and afterward in 
the open ocean. It is found in ail the plankton lists except the 
Challenger. The above record shows it to be fairly common among 
the Philippine Islands and off the coast of Japan. It is apparently 
most abundant at the surface. In the Carnegie plankton it is shown 
to descend to a depth of at least 100 meters; two of the Albatross 
catches were made in vertical hauls from as much as 100 and 300 
fathoms to the surface. 
ACARTIA TUMIDA Willey 
PLATE 20, FIcurES 271-274 
Acartia tumida WILLEy, Rep. Canadian Arctic Exped., 1913-18, vol. 7, Crustacea, 
pt. K: Marine Copepoda, p. 21K, figs. 25-27, 1920. 
More than 100 specimens of this species, including both sexes, were 
taken by V. B. Scheffer, of the U. S. Biological Survey, June 10, 
1937, in a surface tow at the anchorage off Attu Island, the western- 
most of the Aleutian Islands. Originally established by Willey upon 
three females taken in a surface tow a little farther to the east, it 
has not been noted by any subsequent author. Since Willey’s de- 
scription and figures were very limited, a full description is here given, 
that of the male for the first time. 
Female.—Metasome elongate-elliptical, three times as long as wide; 
head separated from the first segment and protruding over the base 
of the rostrum; fourth and fifth segments fused with rounded corners. 
