30 



113. Idotea irrorata, (Say). 



(= /. tricuspidata, Desmarest). 



Exemplarer af denne ved vore Kyster almindeligt fore- 

 kommende Art blev indsamlede ved Rost paa forholdsvis 

 gruudt Vand. Arten er udbredt til Kattegat, Østersøen, 

 de britiske Øer. Middelhavet, det sorte Hav og Østkysten 

 af Nordamerika. 



114. Idotea pelagica, Leach. 



Nogle ganske unge Exemplarer af denne ligeledes ved 

 vore Kyster almindelige Art toges under Expeditionen i 

 Havnen ved Reikjavik. Den synes at være en mere nordlig 

 Form, da den ikke med Sikkerhed er kjendt sydligere end 

 fra de britiske Øer. Den nordamerikanske I. phosphorea 

 Harger synes at komme vor Form meget nær. 



116. Synidotea bicuspida, (Owen). 



Se Iste Afsnit. pg. 11 (i. Pl. X, Fig. 24—26. 

 Findested. Stat. 366. 



II5 Synidotea nodulosa. (Kroyer). 



Adskillige Exemplarer af denne arktiske Form blev 

 under Expeditionens sidste Togt indsamlede ved Norske 

 Øer og i Magdalenebay (Stat. 366) paa Spitsbergen. Arten 

 er udbredt til Grønland, Nordamerikas Øst- og Vestkyst, 

 Polarøerne, Sibiriens Ishav samt det kariske Hav. folgelig 

 circumpolar. 



II3. Idotea irrorata, (Say). 



(= /. tricuspidata, Desmarest). 



Individuals of this species, a common one along the 

 Norwegian coast, were collected at Rost. in comparatively 

 shallow water. Tlie fonn is also met with in the Cattegat, 

 the Baltic. the British Islands, the Mediterranean, and the 

 east coast of North America. 



II4 Idotea pelagica, Leach. 



A few very young individuals of this species, 'also 

 rather common off the coast of Norway, were tåken on 

 the Expedition in the harbour of Reikjavik. The species 

 would appear to Vie a more northern form. haviug not been 

 met with farther south than the British Islands. The North 

 American species 1. phosphorea Harger would appear to 

 closely approximate the present form. 



II5. Synidotea nodulosa, (Kroyer).J 



Several individuals of this Arctic form were collected, 

 on the last cruise of the Expedition, off the Norwegian 

 Islands and in Magdalena Bay (Stat. 366), Spitzbergen. 

 The range of distribution extends to Greenland, the east 

 and west coasts of North America, the Polar Islands, the 

 Siberian Polar Sea. as also the Kara Sea. — and accordingly 

 is circumpolar. 



II6 Synidotea bicuspida, (Owen). 



See Part I. p. 116, Pl. X, tics. 24—26. 

 Locality. — Stat. 366 



