542 



Transactions. 



the costae. These projections are poorly developed on the proximal two 

 costae, and still more poorly on the distal two. Even on the medial costae 

 the lateral projections are developed on only one side of the proximal por 

 tion of each costa, bnt on both sides of the medial and distal portions. The 



Fig. ]. 



A(fl<iopheiii(( laxu ; magnified. 

 ,, natural size. 



„ corbiila ; magnified. 



distal ends of the costae from one side of the rachis overlap the distal ends 

 of those from the other side so as to close the corbulae above, and its 

 extremity is closed by the upcurling of the distal end of the rachis. The 

 specimen from which this description is taken is in the Canterbury Museum. 



Aglaophenia ? x. Fig. 4. 



This specimen is probably an Aglaophenia, but it is impossible to tell 



without the corbulae. I can find no previous description of any form like 



the one under consideration, and probably the species is new. 



Trophosome. — Colony 90 mm. in height, sparingly branched ; all the 



pinnae are in one plane, so that the whole colony is somewhat fan-shaped. 

 The pinnae are alternate. Colour uniformly brown. 

 Hydrocaulus with two not very distinct nodes to each 

 hydrotheca, one opposite the base and one opposite 

 the bend of the hydrotheca. Hydrothecae close to- 

 gether, not deeply inserted in the hydrocaulus, only 

 slightly bent. The front wall of the hydrothecae 

 bulges considerably below the origin of the intrathecal 

 ridge. The thecostome has two teeth on each side, 

 and none in back or front. The intrathecal ridge 

 springs from only the outer side, and is inclined at 

 about 45° to the hydrocaulus. 



The mesial nematophore is very long, and projects 

 for more than half its length clear away from the 

 hydrotheca ; it stands almost at right angles to the 

 hydrocaulus ; there are basal and terminal openings 

 in this nematophore, but in the upper hydrotheca 

 sketched on fig. 4 the basal opening has been ob- 

 literated by faulty drawing. The lateral nematophore 



is long and strongly bent backwards, reaching more than half-way back 



over the hydrocaulus. 



Gonosome. — Not present. 



Hah. — Denham Bay, Sunday Island, Kermadec Islands. 



Fig. 4. 



Aglaophenia ? x ; 

 magnified. 



