IIVDROIDA II 



65 



mobile sarcotheca;. Tlit- hydrcicladia are di\icled by transverse nodes into internodia of which normally 

 everv second one bears one or two unpaired sarcotliecse in tlie median line, the alternate ones having 

 a small hvdrotheca with a supracalycine pair of sarcotheCcC at the month, and an unpaired median sar- 

 cotheca on the proximal part of the internodinm. The hvdrotheca is about ' , to • 3 the length oi the 

 internodium, and is on one side entirely fused therewith. 



The gonothecoe are attached b)' an almost rudimentary stalk to the apophyses; they are oval 

 to pear-shaped, with a distally laterally placed asymmetrical opening. 



200 m. 600m looo m. . 2000m. 



Fig. XXXI. The distribution of Nemerh'sia antenniiia in the Northern .Atlantic. 

 In the hatched parts the Uterature note.s a scattered although common occurrence. 



Material: 



"Ingolf" vSt. 87, 65°o2,3' N., 23°56,2' W.; depth no fathoms 



1,4" 

 5,9° 



(without further details) 



- - 92, 64°44' N., 32°52' W.; - 976 - 



— - 98, 65°38' N., 26°27' W.; - 138 — 

 Greenland: Davis Strait, — 80 — 



_ 65°27'N., 54°45'W.; - 67 

 Iceland : 5 miles E. of Seydisfjord, — 135 — 



The Faroe Islands: Deep hole at the north point of Nolso, depth 100 fathom.s. 



Some luxuriant colonies from Davis Strait exhibit interesting variations in the number of 

 hydrocladia. The nodes of the stem are .slightly marked, and each internodium bears but three apo- 

 physes; owing to the revolution of the internodia therefore, these colonies or parts of colonies are six- 

 rowed; among these colonies again there are others, or in the single colony, other parts, which 111 a 



Q 



The Ingolf-ExpfJilion. V. 7. -^ 



