82 



HYDROIDA II 



species siich as Cladocarpus tennis Clarke and Cladocarpus flexiwsus Nutting. There is therefore the 

 possibihty that the species ma\- liave to be referred to this genus, and the query affixed to the generic 

 name must remain for the present. 



Onl}- 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 Allnian 



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

 hydrocladia with several hydrothecce. All the sarcothecte are immobile. The gonothecse are protected 

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

 with sarcothecse, but lack hydrothecEC. The gonothecse are set on the stem or on the phylactogonia. 



Cladocarpus integer (G. O. Sars). 

 1874 Aglaophenia intcgra, G. O. Sars, Bidrag til Kuudskaben om Norges Hydroider, p. 100, pi. 2, figs 



II— 15. 

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

 1893 Cladocarpus Hohiii, Levinsen, Meduser, Cteuophorer 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 adcaulinally 

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

 The internodium of the hydrocladium has a fairly large Indrotheca and three sarcothecse, 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 hydrotheca; all the sarcothecae approach the tubulous form, but 

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

 the opening; the opening margin, in the hydrothecse as in the sarcothecse, is quite smooth. The inter- 

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



The gonothecte are fastened as a rule by a rudimentary stalk to the stem or to the plu-lac- 

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

 phylactogonium proceeds from the basal internodium of the hydrocladium, beside the proximal sarco- 

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

 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 63=30' N., 54"25' W., depth 582 fathoms, 3,3° 



- - 27 64°54' N., 55°io' W., - 393 - 3,8^ 



- - 94 64°56' N., 36°i9' W., - 204 - 4,1° 



- - 98 65°38' N., 26°27' W., - 138 - 5,9° 



