286 



Part III. — Twelfth Annual Report 



CRUSTACEA. 



The Crustacea obtained were not only numerous, especialty in the 

 bottom material, but included several comparatively rare and interesting 

 species. 



1. COPEPODA. 



Diaptomus gracilis (G. O. Sars). Frequent. 



Cyclops signatus, Koch. Few. 



„ strenuus, Fischer. Few. 



„ viridis (Jurine). Few. 



„ serrulatus, Fischer. Frequent. 



„ magnotavus, Cragin. Very rare. 



,, macrurus, G. 0. Sars. Rare. 



„ fimbriatus, Fischer. Frequent. 



Attheyella crassa (G. 0. Sars). Frequent. 



„ pygmcea (G. O. Sars). Few. 



in tow-net gather- 

 ings. 



in bottom material. 

 ^ in tow-net gather- 



)■ in bottom material. 



2. OSTRACODA. 



Cypria serena(/c^c^ ) • 

 Cyclocypris globosa/ j? - (9 • eQe**^ 

 Candona Candida. u^UXCu^ J 

 „ lactea. /&ukj( 



Few. 

 Few. 

 Few. 

 Few. 



J- in bottom material. 



J 



3. Cladocera. 



Sida crystallina (Miiller). Scarce. 



Daphnia jardinii, Baird. Frequent. 



Bosmina longirostris (Miiller). Frequent. 



Ilyocryptus sordidus (Lievin). Rare. 



Acroperus harpm, Baird. Few. 



Eurycercus lamellatus (Miiller). Frequent. 



Camptocercus macrurus Miiller). Few. 



Alonopsis elongata, G. O. Sars. Frequent. 



Alona quadrangularis (Miiller). Frequent. 



Pleuroxus trigonellus (0. F. Miiller). Scarce. 



Alona guttata (G. 0. Sars). 

 CI ty dor us sphoericus (Miiller). 

 Polyphemus pediculus (Linne). 

 Byfhotrephes longimanus, Leydig. 



Leptodora hyalina, Lilljiborg. 



1 



in surface and 

 under-surf ace tow- 

 net gatherings. 



in bottom material. 



j 



Gra'ptoleberis testudinaria (Fischer). Scarce. J- 



Frequent. 



Frequent. 



Frequent. 



Not com- 

 mon. 



Moderately 

 frequent. 



j 



in tow-net gather- 

 ings and in 

 bottom material. 



in bottom material. 



in bottom material. 



in surface and 

 under - surface 

 tow-net gather- 

 ings. 



