HYDROIDA II 



189 



Taking into consideration the above noted synonyms, only three species are new to the area, 

 viz: flali- CIH HI //ibrosum, Cladocarpus integer and Sertularella tenella. It should here further be noted 

 that the new investigations have especially augmented the' number of species south of 70 N. The 

 East Greenland waters between 60 and 70 N. seem to be very poor in hydroids, even right out on 

 the slope towards the deep of the Frozen Sea, and the Atlantic deep. 



According to Kramp (1914) there are hitherto recorded 88 hydroids from Greenland. In the 

 previous sections we have pointed out the following synonyms, which are given in the mentioned list: 



Corymorpha groenlandica \ 



] = Corymorpha groenlandica 

 islandica } 



Perigonimus roseus \ 



i = Perigonimus roseus 

 Garveia groenlandica ) 



Halecium Beani = Halecium scutum 



Lafoea fruticosa \ 



pocillum = Lafcea fruticosa, forma genuina and forma grandis 



grandis I 



Sertularia polyzonias \ 



} = Sertularia polysonias, forma typica and forma gigantea 

 gigantea 



Plumularia groenlandica = Polynemertesia gracillima 



Antennularia antennina = Nemertesia antennina 



Cladocarpus cornutus = Aglaophenopsis cornuta 



Holmi = Cladocarpus integer 



This means, then, a reduction of five in the number of species. On the other hand, the five 

 new species from the West Greenland area are entirely new to the fauna, so that the number of spe- 

 cies is still 88, or, taking Lafcea fruticosa forma grandis and Sertularella polyzonias forma gigantea 

 as distinct species, the number is increased to 90. The recent studies have thus not greatly increased 

 the number of species, nor was this to be expected. The greatest increment of species new to the 

 fauna was to be expected in Davis Strait, and the few investigation stations made there by the 

 "Ingolf" are entirely covered by the later expeditions with the "Tjalfe", the excellent treatment of 

 which material has contributed in an essential degree to our comparatively close knowledge of the 

 hydroid fauna in West Greenland waters. 



Passing on now to the fauna area of Iceland, we find in the material the following species 

 belonging to this section: 



Coryne Sarsii Corymorpha nutans Bougainvillia conferta 

 * _ pusilla glacialis Eudendrium rameum 

 Myriothela phrygia groenlandica ramosum 

 Tubularia pulcher *Clava multicornis capillare 

 indivisa * Hydr actinia Sarsii Lafaa dumosa 

 larynx echinata fruticosa 



