352 



KNOWLEDGE. 



September, 1913. 







Figure 384. 



The Fish (Scopelus glacialis) with the combined parasites, 

 i.e., the Parasitic Copepod carrying the Hydroid. 



b c 



Figure 385. 



(a) The Parasitic Copepod (Sarcotretis scopeli) adult female 



with egg strings ; (b) Front part of the same, dorso-lateral 



view ; (c) Ventral aspect. 



Figure 387. 



(a) The basal part of the Copepod with Polypes and 

 Medusae-buds; (b) Large Medusae-bud ; (c) Young Hydroid 

 colony (Iclithyocodium sarcotretis) without Medusae-buds. 



Frft 



~~i B 



Figure 388. 



(a) Cyclops stage of Sarcotretis, dorsal and lateral view ; 

 (b) 1st, Pupal stage, dorsal and ventral view. 



Sfc 



N^£TN 



'-■&*£?* 





** 



■^ J* 





. (Ol 



>2 ■ 



-<P 



Figure 386. 



Pupal stages of Sarcotretis, lateral views (a) 2nd ; (b) 3rd, 

 Male specimen ; (c) 4th. 



Figure 389. 



(a) Front part of young female in the boring stage, dorsal view . 

 (b) The same somewhat more developed, ventral aspect. 



A Hydroid E'pizoic on a Parasitic Copepod (see page 354). 



