
vo jm al yon 
ore CARRE, ile Cana 



6a Canadian Arctic Expedition, 191 38-1918 Sas ry 7% 
regard inside the same species and sex, and according to age (see Sars. (1896), 
se ARS 5 ew GY estoy ee, 
EXPLANATION OF TEXT-FIGURES 
(All the figures, except 1d, e, are original, freehand drawings after alcoholic specimens, viewed under the 
microscope.) 




Fig. 1. Telson of Lepidurus arcticus Pall. (see also Olofsson, 1918, figs. 18-19.) 
a 
a. Dorsal view. About x 50. Animal (female) 12 mm. long. Teller, Alaska. 
b. “ “Tn natural position and spread out. About x 50. Animal (female) 83 mm. long. 
Martin point, Alaska. ‘ 
c. “ “Outline of telson, without the spines. About x 50. Animal (female) 18 mm. 
long. Martin Point, Alaska. 
d. “ “"Telson and cercopods of about 13 mm. long, larva from N.E.-Greenland (after 
Brehm). 
e. 3 “ 'Telson and cercopod of about 2 mm. long larva from Filefjeld, Norway (after 
Sars). 
i? “  “Telson and cercopod of 3 mm. long larva from Bernard harbour, N.W.T., July 
3, 1916. About x 100. 
g. “ “About x 50. Animal (female) 7 mm. long. Bernard harbour, N.W.T., August 
16, 1915. : 
h. “ “About x 50. Animal (female) 12mm. long. Bernard harbour, N.W.T., October 
6, 1915 
