EUPHAUSIA SPINIFERA 225 



St. 74, WNW of Benguela. My own specimens came from near this locality (see above). 

 So far then there is no record of this species but from the Atlantic off the west coast of 

 Africa. 



Euphausia spinifera, Sars (Figs. 19, 20, 28 ft) 



E. spinifera, Sars, 1885, pp. 93-5, pi. xvi, figs. 9-16; Hansen, 191 1, p. 35 ; Zimmer, 1914, p. 429; 



Tattersall, 1924, p. 26; 1925, p. 8, pi. ii, fig. 5; Illig, 1930, p. 503. 

 E. schoiti, Ortmann, 1893, p. 13, pi. vii, figs. 8 and 8 a (larva). 

 E. longtrostris, Illig, pp. 504-7, figs. 183-190 (larval and post-larval stages). 



Description. The rostrum is strong and long reaching forward beyond the front 

 part of the eye but not to the end of the first segment of the antennular peduncle 

 (Fig. 19 a). The gastric area of the carapace is faintly convex and is keeled in the mid- 



Fig. 19. E. spinifera. a, carapace and antennular peduncle from the side, x 14. b, left antennular peduncle 

 from above, x 17. c, third to fifth abdominal segments from the side, x 8. 



dorsal line. In the position occupied by the dorsal organ in the larval stages the keel 

 rises into a short crest which is abruptly terminated in front by a notch easy to see with 

 the naked eye ; the keel runs some way down the rostrum. The carapace is produced into 

 a strong post-ocular spine above each eye. On either side of the carapace near the for- 

 ward end there is a mound-like projection giving rise to a hepatic spine similar to but 

 blunter than that of E. hanseni. There is a single pair of lateral denticles set above an 

 incision in the lower edge of the carapace. 



The lobe at the end of the first segment of the antennular peduncle is large and wide — 

 wider than the second segment and wider distally than at the base ; it is divided distally 

 into a number of spines, usually four to six (Fig. 19 rt, b). A strong flattened tooth-like 

 projection rises over the third segment from the middle of the distal margin of the 



