328 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 
At the inner distal corner of the second segment is a huge spine per- 
fectly smooth and nearly as long as the entire leg. The two spines are 
slightly curved and project so obliquely inward that their tips almost 
meet on the midline. Total length 3.80 mm. Metasome 3 mm. long, 
1 mm. wide. 
Types —U.S.N.M. No. 74150; station 5231, latitude 10°01’15’’ N., 
longitude 124°43’15” E., between Bohol and Leyte, Philippine 
Islands. 
Remarks.—This species may be readily recognized by its triangular 
crest, which comes to a point in front when viewed laterally, and by 
the unique details of the fifth legs, the huge spines being visible with- 
out removing the legs. 
SCAPHOCALANUS MAGNUS (T. Scott) 
Amallophora magna T. Scott, Trans. Linn. Soe. London, ser. 2, Zool., vol. 8, 
pt. 1, p. 55, pl. 4, figs. 5-9, 1894. 
Stations 2; 2219; 4646; 4655; 4663; 4665; 4681; 4711; 4715; 4716; 
4717; 4719; 4793; 5120; 5129; 5185; 5231; 5320. Identified by Sars 
from 10 of these Albatross stations and from 7 Monaco stations; also 
reported from 9 Siboga stations and the Carnegie plankton. In the 
preliminary Monaco list Sars (1905a, p. 6) placed this species in the 
genus Amallophora, transferring it to the present genus in the final 
Monaco report (1925). 
SCAPHOCALANUS MEDIUS (Sars) 
PLATE 34, Figures 515-517 
Amallophora media Sars, Bull. Inst. Océanogr. Monaco, No. 101, p. 16, 1907. 
Scaphocalanus medius Sars, Rés. camp. sci. Albert de Monaco, No. 69, p. 173, 
pl. 44, figs. 1-8, 1925. 
Stations 4679; 4717; 5120; 5230. Established by Sars upon a few 
females taken in the Atlantic south of the Azores; appearing in the 
Carnegie plankton and listed by Sewell (1929, p. 208). Five females 
are listed from the first two stations in the eastern tropical Pacific and 
twenty specimens, representing both sexes, at the last two stations in 
the Philippines. Since the male is the first of its sex to be found, 
it is here described and figured. 
Female.—Metasome elliptical, head fused with the first segment 
and smoothly rounded in front without any crest, fourth and fifth 
segments also fused with rounded corners, which barely overlap the 
anterior margin of the genital segment. Urosome one-third as long 
and one-fourth as wide as the metasome, 4-segmented. First antennae 
reach the center of the last metasome segment. The fifth legs are 2- 
segmented, the end segment with a long inner seta plumed only on the 
