30 " ENDEAVOUR " SCIENTIFIC RESULTS. 



immediately above a hydrocladinm ; ultimate branches pinnately 

 arranged, divided into internodes of very varying lengths, each 

 bearing from one to many alternate short hydrocladia, which are 

 supported on short processes of the branch making with it an 

 angle of about 35°-i0°, and which are divided by slightly oblique 

 joints into internodes, each of which bears a hydrotheca and has 

 about live strong internal annular ridges, 



Hydrotheca? lying along the internode, sub-tubular, curving 

 slightly upward and in the distal part recurved towards the 

 internode ; a strong intrathecal ridge springing from the front 

 of the hydrotheca a little below the middle, and directed somewhat 

 forward ; distal part of the hydrotheca (about one-third of its 

 length) free, but with the whole of the lower side sinuated down 

 to the hydrocladium, the two sides of the free part asymmetrical, 

 one being rounded off, the other produced forward into a large 

 angular lobe. 



Sareotheca? bithalamic, canaliculate, moveable, the terminal 

 cups narrow ; one, on an angular prominence of the hydrocladium, 

 below each hydrotheca, one at each side above (under the free 

 part of the hydrotheca), two abreast on each of the processes 

 supporting the hydrocladia, one behind and one in front of the 

 rachis just below each axil, and others at irregular intervals along 

 the rachis. A crateriform prominence on each hydrocladium- 

 process. 



Gonosome. — Gonotheca? on the apophyses of the hydrocladia, 

 small (about twice the length of the hydrotheca?), regularly 

 pear-shaped, tapering gradually to the base and slightly flattened 

 at the top, delicate and colourless, almost membranous. A cluster 

 of rounded highly refractive granules near the aperture. 



Colour. — Light fawn. 



I received two specimens of this remarkable species (perhaps 

 the largest of the genus), both nearly two feet in height. One 

 compi-ised a main stem and comparatively few branches, all on 

 the upper half, while the other was branched profusely for about 

 the upper three -fourths of its height, having a lateral spread of 

 over a foot near the summit. The base of this specimen is a 

 dense spongy fibrous mass of conical form, between two and 

 three inches in diameter at the area of attachment, and of about 

 the same height. From the apex of this rise two stems, each 

 about one-fifth of an inch in diameter, one however is broken off 

 short, the other bearing thepolypidom described above, which, as 

 the branches tend to spread laterally, assumes a flabellate form. 

 The hydrotheca? differ from those of all other species known to 



