111 
3 the cepbalon is more distinctly bilobate i han 
stage 1 the cephalon is rounded without 
2 . 
Fig. 12. Holophryxus (Richardi?). 
The oral area. 
in stage 2; in 
any trace of a furrow. 
The size of the specimens 
is enlarged (stage 1 3,7 mm. 
long, stage 2 9 mm., stage 3 14 
mm.), but the relative breadth 
is diminished (stage 1 2: 3,7 mm. 
== 1 : 1,85; stage 2 4:9 mm. 
= 1 : 2,25; stage 3 14 : 5,5 mm. 
= 1:2,55). 
3. Each species of Dajidæ 
has, as far as we know, only one 
single species as host (excluding 
Dajus Mysidis), and liere the 
Sergestes arcticus. Stage 1 was 
host probably in all 3 cases was 
taken 33°41 r N, 36° 55 f W, 0—2500 m., thus in the territory of 
distribution of Sergestes arcticus (see H. J. Hansen, Ingolf 1908, 
p. 82); stage 2 was taken together with Sergestes, and stage 3 
was found fixed to Sergestes. 
lig. 13. Holophryxus Acanthephyræ on Acanthephyrci purpurea 
(above) and Holophryxus (Richardi?) on Sergestes arcticus (below). 
