HYDROIDA II 



Cladocarpus formosus All in an. 



1874 Cladocarpus formosus, Allinan, Report on the Hydroida Porcupine, p. 478, pi. 68, fig. i. 



1893 Cladocarpus crenulatus, Levinsen, Meduser, Ctenophorer og Hydroider, p. 68, pi. VIII, figs. 1314. 

 The colonies have an unbranched or branched polysiphonic stem. The primary, foremost tube 

 is divided into short internodia with a short apophyse directed obliquely forward and sideways, and 

 three sarcotheca:, a pair at the upper side of the apophyse, and an unpaired median on the basal 

 part of the internodium, all adcladially split. The internodia of the hydrocladium are short, and bear 

 a large broad hydrotheca and three sarcothecse, a supracalycine pair at the hydrothecal aperture, and 



A 



Fig. XI<V. Cladocarpus formosus. 

 a Basal part of a hydrocladium with its phylactogonium, "Ingolf" St. 29 (X 4)- 



6 Hydrotheca of the same specimen (X 60). 



c Hydrotheca of the variety from -'Ingolf St. 25 in side view (X 60). 

 d Front view of a hydrotheca of the same specimen (X 601. 



a median proximal, which reaches with its opening margin nearly up to the middle of the hydrotheca; 

 the sarcothecse have a slightly dentate margin, and are adcaulinally split. On the basal internodium 

 of the hydrocladium, the proximal sarcotheca is divided off by an interval from the hydrotheca. The 

 hydrothecae are large, and nearly circular in transverse section, with an abcladial intrathecal septum ; 

 the opening margin is slightly sinuous, with more prominent teeth abcladially, and with a quite di- 

 stinct abcladial median tooth. 



The gonothecse are situate on the stem or on the phylactogonia, which proceed from the basal 

 internodium of the hydrocladium, at the interval between the hydrotheca and the proximal sarcotheca. 

 The phylactogonia have, after two dichotomic divisions, three branches, and bear on their outer side 

 two rows of paired or irregularly placed sarcothecse. The gonothecae are somewhat flattened, pear- 

 shaped from the broad side, with transversely rounded distal part; seen from the side, with a terminal 

 lateral opening over which one wall domes out in a markedly prominent upper lip. 



