80 BULLETIN 15 8, UNITED STATES NATIONAL MUSEUM 



Color. — No observations of the color of the living copepod have 

 been recorded; this specimen was a dull yellowish color, without 

 pigment, but it had been in alcohol 42 years. 



Female. — Metasome four times as long as urosome; rostral fila- 

 ments bifurcate at the tip; first antennae extending beyond the 

 caudal rami ; exopod of second antenna one-fourth longer than endo- 

 pod; fifth legs indistinctly 3-segmented, the end segment with a 

 short apical spine, an inner spine twice the length of the apical one, 

 close to the latter and setose, and no outer spine. Total length, 

 4.3-5.6 mm. 



Male. — Body slender; urosome almost half as long as metasome; 

 first antennae just reaching the caudal rami ; fifth legs very slender, 

 left basipods narrow, cylindrical, exopod 3-segmented, end segment 

 short and strongly tapered, endopod 1-segmented, filiform, longer 

 than the exopod ; right endopod clavate, less than half as long as the 

 narrowed portion of the second basipod, right exopod 3-segmented, 

 the segments elongate and filiform. Total length, 3.75-4.25 mm. 



Remmrhs. — This species can be recognized by the length of the 

 first antennae and by the form of the fifth legs in both sexes. It 

 was captured by Bigelow in deep water east of Georges Bank and 

 just outside of the present area. Farran said : " This species is a 

 noticeable feature of the deep water plankton off the west coast of 

 Ireland at depths of 330 to 1,150 fathoms." 



Genus SCOTTOCALANUS G. O. Sars, 1905 



Head fused with first segment and bearing a frontal crest ; fourth 

 and fifth segments also fused, with angular corners ; urosome 4-seg- 

 mented in female, 5-segmented in male; rostrum bifurcate, each 

 ramus with an articulated apical spine ; apical lobe of second maxillae 

 with a terminal claw, curved and setose; exopods of first four pairs 

 of legs 3-segmented; first endopod 1-segmented, second endopod 

 2-segmented, third and fourth endopods 3-segmented; fifth legs uni- 

 ramose in female, the end segment bearing only 2 spines, biramose 

 in male. One species found here. 



SCOTTOCALANUS PERSECANS (Giesbrecht) 

 FlQUEE 55 



Scolecithrix persecans Giesbkecht, Bull. Mus. Comp. Zool., vol. 25, no. 12, 



p. 253, pi. 3, figs. 6-12, 1895. 

 ScottocaJanus persecans A. Scott, Si&osro-Expeditie, 29a, Copepoda, pt. 1, p. 105, 



pi. 27, figs. 10-18, 1909. 



Occwrrence. — Three females taken in vertical hauls. Stations 20058, 

 20096, Grampus. 



