. Bulletin - United States National Museum. Science. COPEPODS OF THE WOODS HOLE REGION 25 in the plankton, and have been described by Damas, 1905, and by Lebour, 1916. CALANUS HELGOLANDICUS (Claus) FlGUBE 11 CetocMlus helgolandicus Claus, Die frei lebenden Copepoden, p. 171, pi. 26, figs. 2-9, 1863. Calanus helgolandicus Sabs, Crustacea of Norway, vol. 4, p. 11, pi. 4, 1901. Occurrence.—Ten males and females from trawl wings. Stations 951, 986, 993, Fish Hawk; 2 females in vertical net. Station 10245, Grampv^. DistHhution.—British Isles (Brady) ; coast of France (Canu); Mediterranean (Giesbrec
. Bulletin - United States National Museum. Science. COPEPODS OF THE WOODS HOLE REGION 25 in the plankton, and have been described by Damas, 1905, and by Lebour, 1916. CALANUS HELGOLANDICUS (Claus) FlGUBE 11 CetocMlus helgolandicus Claus, Die frei lebenden Copepoden, p. 171, pi. 26, figs. 2-9, 1863. Calanus helgolandicus Sabs, Crustacea of Norway, vol. 4, p. 11, pi. 4, 1901. Occurrence.—Ten males and females from trawl wings. Stations 951, 986, 993, Fish Hawk; 2 females in vertical net. Station 10245, Grampv^. DistHhution.—British Isles (Brady) ; coast of France (Canu); Mediterranean (Giesbrecht) ; Black Sea (Karawajew); Norwegian coast (Sars) ; Australian coast (Brady); Chesapeake Bay (Wil- son). Color.—Those from Station 951 showed blotches of reddish along the ventral edges of the segments and at the posterior end of the body; lines of vermilion also sometimes ap- peared between the segments, but were more often wanting. In the lot obtained at Station 993 the entire body was of a bright pink by lamp- light. (Rathbun.) Female.—Head separated from the first segment; fifth segment with rounded posterior corners; first an- tennae reaching about 2 segments be- yond the tips of the caudal rami; caudal rami scarcely longer than the anal segment; inner margin of first basipod of fifth legs concave and armed with coarse teeth length, mm. Male.—Smaller than the female; first antennae relatively a little longer, extending three or four segments beyond the caudal rami. Fifth legs quite asymmetrical, both left basipods and the two proxi- mal exopod segments elongated, the distal exopod segment only half the length of the second segment, the left endopod reaching but little beyond the first segment of the exopod. Right leg much shorter than the left, its endopod reaching well beyond the base of the end segment of the exopod. Total length, mm. Remarks.—Most recent authors regard this species as a synonym of pmnarchicus, but Sars gave sufficient rea
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