14 



OSCAR SUND 



[REP. OF THE "MICHAEL SARS" NORTH 



by the "Michael Sars" (4-7 — 7-0 mm.) had spines on the 

 4th, 5th and 6th only, see fig. 15. 



Larval examples of Sergestes robustus were taken 

 on the folloving occasions: 

 St. 51, m.w. one, C = 2-4 mm. 

 „ 52, „ one, C = 1-5 „ 

 „ 53, 60 „ one, C = 2-0 „ 

 „ 64, 100 „ ten, C = 1-9 — 2-5 mm., one 1-5 mm. 

 „ , 300 „ two, C= 1-7, 2-1. 



Sergestes splendens n. sp. 



This handsome species is a near relative of S. ro- 

 bustus which it resembles in the form of its powerful body 

 (see fig. 16) though of much smaller size, the adult females 

 not reaching a total length of 40 mm. The males are 

 smaller. Though of such moderate size S. splendens has 

 a stout and more muscular body than perhaps any other 



Fig. 16—18. Sergestes splendens, tf 10, st. 49, 3000. Outline of body ( 2 A), rostrum ( 3U /i), ext. uropod and scaphocerite ( l %) 



and petasma ( 3 %). 



Sergestes. The sizes of the specimens taken are given 

 in the following table: 





Length of carapace (mm.) 



Total 





4 



5 



6 



7 8 



9 | 10 



11 



12 





Males 



4 



4 



12 



21 



5 



3 



6 







51 



Females 





14 



5 



22 



3 



3 



6 



1 



1 



55 



Young 



5 



















5 



The rostrum is in most specimens of the form re- 

 presented in fig. 16, though it is subject to some variation 

 as will be seen from fig. 19. 



The carapace has distinct grooves but no ocular spine, 

 and the hepatic spine is represented only by a bluntly 

 rounded lobe. The eyes are larger than those of S. ro- 

 bustus, and spherical. On the inner and upper side of 

 the stalks there is the rudiment of an ocular tubercle. 



