HYDROIDA II 



189 



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

 viz: Haleciutn labrosum^ Cladocarpus integer and Ser hilar ella 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. lu the 

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



Corvmorpha groe)ilaudica 



— islai/dica 

 Perigoiiiiius rose us 

 Garvcia groeulandica 

 Haleemm Beaiii 

 iMfoea friiticosa 



— foe in Hill 



— grand is 

 Seriiilaria polyzonias 



— giganiea 



Pluiiiularia groeiilandiea 

 Anteiinularia etiiteiiiiiiia 

 Cladocarpus conuttns 



— Ho I mi 



= Coryinorpiia groenlandica 



= Perigoiiiinus roseiis 



= Haleeiitiii sciitnm 



= Lafcea frnheosa^ forma geuuiiin and forma graiidis 



I ^ Sertularia polyzomas, forma typiea and ioin\a. gigantea 



= Polyncmertesia gracilliiiia 



= Nemertesia antennina 



= Aglaopheiiopsis corimta 



= 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 Lafeea friiticosa forma graiidis 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 

 belougina: to this section: 



Coryne Sarsii 

 * — piisilla 

 Myriothela phrygia 

 Tubularia piilclier 



— indivisa 



— larynx 



Coryinorpiia nutans 



— glacialis 



* — groenlandica 



*Clava iinilticornis 

 *Hydracfinia Sarsii 



— echinata 



Boiigainvillia confer ta 

 Etidendriiini rainenm 



— ramus urn 



— c a pi I la re 

 La/era diimosa 



— fruticosa 



