HYDROIDA 11 



85 



Cladocarpus formosus All man. 



1874 Cladocarpus formosuSy Alhnan, Report on the Hydroida Porcnpine, p. 478, pi. 68, fig. i. 



1893 Cladocarpus crciiiilafiis, Levin.sen, Medu.ser, Ctenophorer og Hydroider, p. 68, pi. VIII, figs. 13 — 14. 

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

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

 three sarcothecse, a pair at the njaper side of the apoph\se, 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 sarcothecai, a supracalycine pair at the hydrothecal aperture, and 



Fig. XLV. Cladocarpus formosus. 



a Basal part of a hj-drocladium with its phylactogonium, "Ingolf St. 29 (X 40)- 



d 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 nearh' up to the middle of the h.\-drotheca; 

 the sarcotheca; have a slightly dentate margin, and are adcaulinally split. On the basal internodunn 

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

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

 the opening margin is slightly sinuous, with more prominent teeth abcladialh, 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 gouothecje arc somewhat flattened, pear- 

 shaped from the broad side, with transverseh' rounded distal part; seen from the side, with a termmal 

 lateral opening over which one wall domes out in a markedl)- prominent upper lip. 



