— 35 



Cirolana and others go into the depths and up to the 

 present time it has only been possible to notice those 

 forms, that stick to fishes. It is interesting, that lately the 

 earthy form Oniscus is brought from Kamtchatka. 



From the Amphipoda only Gammaridae and Lysianas- 

 sidae are of any importance as food for some fishes; the 

 other specimens (rather numerous in species and form) 

 are of no importance, though they nearly all serve as 

 food for young fish and small kinds of fish. But there 

 exists no systematical definition. 



Some fresh water forms Entomostraca collected now 

 and again, are stated, but there is no information, as to 

 their spreading and quantity. The fresh- water plankton, 

 which has been collected by me, is not yet determined. 



The fairly large sized Branchipus (of the Phyllopoda) 

 was not reckoned to number of fish food. 



In consequence of the great importance of the Cope-' 

 poda in plankton, the salt, as well as the fresh water ones 

 are not studied at all.. On may judge of their great number 

 by the immense spaces of sea-covered with white stripes- 

 which are formed by members of this class. Parasitic- 

 forms of Copepoda are not studied even to the present time. 



The Cirripedia are not described at all, but they are 

 (with a few exceptions) of no importance as food for 

 fish. 



An important food for the young fish is the larva of 

 mosquitoes and other water insects. A splendid collection 

 of insects (unfortunately the majority are coleoptera) is 

 now being worked upon. 



Chaetopoda 4 though serving as food to young sea-fish, 

 also not studied, nor the collections of sponges either. 

 The only ascaridae, that has been studied as the parasite 

 of the fur seal. The Echinodermata the Echinus neglectus 

 is of importance in the sea-otter's life; the young ones 

 serve as food to many fishes. Out of the numerous 

 specimens of sea-stars only the small species Ophiuridae 

 are of importance as fish-food. 



