14 PROCEEDINGS OF THE NATIONAL MUSEUM vol.82 



The antennae extend nearly or quite to the fourth cephalothoracic 

 .segment. The swimming feet are typical of the genus. Plate 8, 

 Fig-ure 6, shows the fourth foot. In the fifth foot (pi. 7, fig. 2) the 

 second segment of the basij)od has a seta about midway of its outer 

 margin. The first segment of the exopod is about twice as long as 

 broad; it has a long spine at about midway of its outer border and 

 another at its outer distal angle ; the unguiform process of the inner 

 distal angle projects at an angle of about 45° with the axis of the 

 segment; the distal border of this process is armed with 6 to 11 

 leeth. The second segment of the exopod is about one-half as long 

 as the first and has a spine at the outer distal angle and a long 

 terminal spine. 



Length, 1.9 to 2.25 mm. 



Male. — The cephalothorax is narrower than in the female, and 

 elliptical rather than oval in outline. The abdomen (pi. 7, fig. 3) is 

 slender, the segments being of about equal lengths. The f ureal rami 

 have about the same proportions as in the female; they are ciliate 

 on the inner border, and very sparsely ciliate on the outer. The 

 fifth foot is shown in Plate 7, Figure 5; the right foot is distinctly 

 4-segmented. 



Length, 1.95 to 2.1 mm. Collected by Frits Johansen, of the 

 Canadian Arctic expedition, at Bernard Harbor. 



EURYTEMORA HERDMANI Thompson and Scott 



Plate 8, Figures 1-3 



Enrytemora herdmanl Thompson and Scott, 1897, p. 78, pi. 5, figs. 1-11. — 

 GiESBUECHT and Schmeil, 1898, p. 103. — Sharpe, 1910, p. 410, fig. 2. — 

 Wilson, 1932, pp. 112-114, fig. 75. 



Wings of last cephalothoracic segment very largely developed, ex- 

 tending distad beyond the first abdominal segment. (PI. 8, fig. 2.) 

 The first abdominal segment is expanded in the distal half into two 

 rounded projections extending distad. The first antennae are about 

 as long as the cephalothorax. In the fifth foot of the female (pi. 8, 

 fig. 1) the first segment of the exopod has two spines on the outer 

 border. The process of the internal border is long, extending distad 

 beyond the end of the terminal spine of the second exopod ; it is armed 

 with dentations on both inner and outer borders. The last two seg- 

 ments of the exopod of the right fifth foot of the male are not united. 

 (PI. 8, fig. 3.) 



Length, 1.6 mm. 



Occurrence. — This species was described from material collected in 

 the Gulf of St. Lawrence. Williams (1906) reported it in Narra- 

 gansett Bay; Sharpe (1910) and Wilson (1932) from Woods Hole, 



