226 Proceedings of the Royal Physical Society. 



the name Cladocarpxts bonneviece, Jaderholm. The species must be regarded, 

 however, as a link binding Cladocarpus to the apparently less specialised 

 Halicornaria. 



Cladocarpus (?) campanulatus, sp. nov. 1 



Trophosome. — The main stem of the colony reaches a height of 65 mm. 

 and bears numerous branches — the longest 40 mm. in length — from which 

 branches of second degree may arise. In the solitary specimen before 

 me all the branches, with an exceedingly diminutive exception, arise from 



C.sef,t~. 



Fig. 4. 



Colony of Cladocarpus campanulatus, 



nat. size. 



Fig. 5. 

 Portion of hydroclade, with hydrothecse, 



of Cladocarpus campanulatus. x 50. 

 s. s., supracalycine sarcotheca. 

 i. sept., internodal septum. 

 n., node. h., hydrotheca. 



b., upper border of deeply staining 



portion. 

 m. s., mesial sarcotheca. 



one side of the colony, but this may be an individual peculiarity without 

 specific import. The stem and branches are fascicled, but considerable 

 distal portions remain free. The anterior tube is divided by indistinct 

 nodes into short internodes, each of which bears a hydroclade on a process 

 arising from its lower two-thirds. 



The hydroclades are alternate, close-set, reach a length of up to 10 mm., 

 and are divided into short internodes, each of which bears a hydrotheca. 

 The posterior wall of each internode is convex. The internodal cavity 



1 Diminutive from annjmna, a lull, in allusion to the inverted hell shape of the 

 hydrothecse. 



