. Bulletin - United States National Museum. Science. COPEPODS OF THE WOODS HOLE REGION 531 10 mm. Distribution.—Danish coast (Kr0yer, Steenstrup); English seas (T. and A. Scott) ^ Greenland (Stephensen). Color.—Young females and males a uniform snowy white; older females tinged more or less with brown, the color deepening with age. Female.—Cephalothorax a little wider than the trunk, the lateral lobes sometimes enlarged into knobs, sometimes bifid; neck of me- dium Avidth and varying length. Trunk more or less heart-shaped and strongly de- pressed; caudal rami small and laminate or knoblike; p
. Bulletin - United States National Museum. Science. COPEPODS OF THE WOODS HOLE REGION 531 10 mm. Distribution.—Danish coast (Kr0yer, Steenstrup); English seas (T. and A. Scott) ^ Greenland (Stephensen). Color.—Young females and males a uniform snowy white; older females tinged more or less with brown, the color deepening with age. Female.—Cephalothorax a little wider than the trunk, the lateral lobes sometimes enlarged into knobs, sometimes bifid; neck of me- dium Avidth and varying length. Trunk more or less heart-shaped and strongly de- pressed; caudal rami small and laminate or knoblike; posterior processes becoming larger and more profusely branched with age. First and second antennae 3-seg- mented, the basal segment the largest; first maxilla a tiny knob easily overlooked; sec- ond maxilla a dactylose proc- ess tipped with a claw; max- illipeds with a swollen basal segment and a stout apical claw. Total length, 45-60 mm. Male.—First and second antennae 3-segmented, first pair tipped with two stout spines, second pair with three spines; the second segment of the second pair has a wide process on the inner margin armed with three spines. Basal segments of maxilli- peds fused across the midline, terminal segments slender and tipped with chelae. Total length, 2 mm. Greatest width, 1 mm. Remarks.—This parasite can be recognized by the widened head and trunk connected by the long and comparatively narrow Figure 315.—Sphyrion lumpi: a. Female, dorsal (drawn by Rathbun) ; i, male, lateral Family ANTHEACHERIDAE Genus PHILICHTHYS Steenstrup, 1862 Female.—Head separated from first segment, small and rounded, without a carapace; no neck; trunk elongated, narrowed poste- riorly and distinctly segmented, each segment being subdivided and all of them, including the head, furnished with paired lateral and ventral processes, which curve downward and inward. Anterior thorax swollen and orbicular, posterior portion cylindrical and tapered backward; abdomen s
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