HYDROIDA 



33 



layers, as is seen (Text-fig. H) from the finds to the north east of the Faroe Islands and on the south 

 east coast of Iceland (Broch 1903). As new localities must be added Northern Iceland (0fjord). On 

 the other hand, the specimens from Davis Strait, recorded by Levinsen (1893) as Amallhaea islandica, 

 prove to belong to Corymorpha groenlandica (Allman). 



Corymorpha groenlandica (Allman) Broch. 

 1876. Monocaulus groenlandica, Allman, Diagnoses Jof new Genera and Species of Hydroida, p. 257, 



PI. IX, Fig. 7—8. 

 1893. Amalthaa islandica -\- Monocaulus groenlandica, Levinsen, Meduser, Ctenophorer og Hydroider 



fra Gronlands Vestkyst, p. 151. 



20om. 600m. ._ 1000m. 2000m. 



Text-fig. H. Finds of Corymorpha glacialis in the Northern Atlantic. 



1899 Lan/pra atlautica -f Lampra purpurea, Bonnevie, Norske Nordhavs-Expeditiou, p. 20, Tab. II 



Fig. 4, Tab. Ill Fig. 1. 

 I9 03 _ socia, Swenander, Uber die athecaten Hydroiden des Drontheimsfjordes, p. 6, Taf. 



Fig- 1—3- 

 IC pg — arctica, Jaderholm, Hydroiden, p. 41, Taf. I Fig. 9—10. 

 1909 Corymorpha spitzbergensis, Broch, Die Hydroiden der arktischen Meere, p. 140. 

 101$ — groenlandica, Broch, Hydroiduntersuchungen IV, p. n. 



The hydrocaulus, when extended, attains a height of 100 mm; it is widest at the base, where 

 it is attached to the substratum by numerous rhizoids, and is gradually tapering upwards till close 

 below the polyp where the width reaches its minimum. The polyp has a wide base, surrounded by 



The Ingolf-Expedition. V. 6. -J 



