COPEPODS GATHERED BY ALBATROSS—WILSON 57 
Allotype male.—U.S.N.M. No. 73739. 
Remarks.—These Albatross specimens were all sizes from small ones 
whose dimensions were the same as those given by Willey up to the 
size here recorded. This suggests that Willey’s specimens had not 
fully matured. The stocky urosome and the details of the fifth legs 
are distinguishing characters. 
Genus ACROCALANUS Giesbrecht, 1888 
ACROCALANUS GIBBER Giesbrecht 
Acrocalanus gibber GiESBRECHT, Atti Accad. Lincei, Rome, ser. 4, vol. 4, sem. 2, 
p. 332, 1888; Fauna und Flora des Golfes von Neapel, monogr. 19, pp. 171, 
175, pl. 6, fig. 32; pl. 10, fig. 37, 1892. 
Stations 16; 65; 66; 71; 8789; 3799; 3829; 4009; 4037; 4644; 5175; 
5185; 5186; 5190; 5208; 5223; 5226; 5228; 5232; 52383; 5240; 5262; 
5263; 5801; 53820; 5340; 5382; 53886; 5387; 53899; 5412; 5413; 5424; 
5434; 5487; 5651; Sabtén Island, Philippine Islands; Fiji Islands. 
Sewell (1929, p. 80) found this species to be one of the commonest 
among the /nvestigator collections in Indian waters. This Albatross 
record indicates that it is also widely distributed throughout the 
Philippines, although the number of specimens collected at each station 
seldom exceeded two or three. It was listed in the Siboga and 
Carnegie planktons. 
ACROCALANUS GRACILIS Giesbrecht 
Acrocalanus gracilis GIESBRECHT, Atti Accad. Lincei, Rome, ser. 4, vol. 4, sem. 2, 
p. 332, 1888; Fauna und Flora des Golfes von Neapel, monogr. 19, pp. 171, 175, 
pl. 6, fig. 27; pl. 10, fig. 35, 1892. 
Stations 13; 16; 24; 30; 81; 41; 42; 45; 48; 52; 53; 655 66; 67; 71; 
73; 80; 3799; 3829; 3878; 3901; 3912; 3932; 3952; 3980; 4009; 4011; 
4037; 4784; 4926; 4952; 5120; 5133; 5134; 5175; 5180; 5185; 5186; 
5190; 5208; 5298; 5225; 5226; 5227; 5228; 5230; 5231; 5233; 5234; 
5240; 5246; 5262; 53801; 5312; 5320; 5340; 5342; 5346; 5348; 5349; 
53882; 5386; 53887; 53895; 5399; 5410; 5411; 5415; 5422; 5434; 5437; 
5507; 5646; 5647; 5651; 5653; Fiji Islands; Sabtaén Island, Philippine 
Islands; Charles Island, Galapagos. Well distributed in the Siboga 
plankton and abundant in the Carnegie plankton, the number of 
specimens at each station of the long list above nearly always reached 
two figures. In strong contrast with the preceding species, this one 
must be recorded as the most abundant species of the genus. 
ACROCALANUS LONGICORNIS Giesbrecht 
Acrocalanus longicornis GIESBRECHT, Atti Accad. Lincei, Rome, ser. 4, vol. 4, sem. 
2, p. 832, 1888; Fauna und Flora des Golfes von Neapel, monogr. 19, pp. 171, 
175, pl. 6, figs. 25, 38; pl. 10, figs. 34, 36, 39, 1892. 
