82 HYDROIDA II 



species such as Cladocarpus tenuis Clarke and Cladocarpus flexuosus Nutting. There is therefore the 

 possibility that the species may have to be referred to this genus, and the query affixed to the generic 

 name must remain for the present. 



Only the one specimen was found, in the deep south west of Iceland. The locality suggests 

 that we have here to deal with a warm-water form from the deep water of the Atlantic. 



Cladocarpus Allman 



Upright colonies with branched or unbranched main stem, the apophyses with unbranched 

 hydrocladia with several hydrothecae. All the sarcothecae are immobile. The gonothecae are protected 

 by small branches, phylactogonia, which form a basal appendix to the hydrocladia, and are furnished 

 with sarcotheca?, but lack hydrothecse. The gonothecae are set on the stem or on the phylactogonia. 



Cladocarpus integer (G. O. Sars). 

 1874 . \glaophenia Integra, G. O. Sars, Bidrag til Kundskaben 0111 Norges Hydroider, p. 100, pi. 2, figs 



11— 15. 



1879 Cladocarpus Pourtalesi, Verrill, Notice on recent additions to the marine fauna, p. 309. 



1893 Cladocarpus Holini, Levinsen, Meduser, Ctenophorer og Hydroider, p, 67, tab. VIII, figs. 15 — 18. 



The colonies are doubly pinnate with branched polysiphonic main stem, exhibiting only in its 

 very outermost parts the primary segmented tube alone; this has fairly short internodia, bearing on 

 the basal third a strong but short apophyse; the internodium is also furnished with three adcauliually 

 split sarcothecae, an unpaired median at the bottom, and a pair at the upper side of the apophyse. 

 The internodium of the hydroeladium has a fairly large hydrotheea and three sarcothecae, a supra- 

 calycine pair at the opening, and a median proximal sarcotheca, which with its opening margin hardly 

 reaches up to the basal fourth of the hydrotheea; all the sarcothecae approach the tubulous form, but 

 are adcladially split. The hydrothecae are laterally somewhat compressed, and slightly expanded at 

 the opening; the opening margin, in the hydrothecae as in the sarcotheca:, is quite smooth. The inter- 

 nodium exhibits one or two inner ribs at the hydrotheea wall, and two below the proximal sarcotheca. 



The gonothecae are fastened as a rule by a rudimentary stalk to the stem or to the phvlae- 

 togonia, which are almost invariably unbranched, and have two irregular rows of sarcothecae; the 

 phylactogouium proceeds from the basal internodium of the hydroeladium, beside the proximal sarco- 

 theca. The gonotheca is somewhat flattened; seen from the flat side it is broadly pear-shaped, broadly 

 rounded distally; viewed laterally, it is a slender oval, with a distal lateral adcauline opening over 

 which the abcauline wall domes out like an upper lip. 



Material : 



"Ingolf" St. 25 6 3 °3o' N, 54°25' W., depth 582 fathoms, 3,3° 



- 27 6 4 °54' N, 55 °io' W, 393 3,8° 



- 94 6 4 " 5 6' N, 3 6°i 9 ' W, - 204 - 4,1° 



- 98 6 5 ° 3 8' N, 26°2 7 ' W, - 138 5,9° 



