181 BYD.R01DA.- — BALE. 



on lice is formed in front of the axil, on the apophysis of the new 

 branch. Through 1 his proceeds an offshoot from the coonosarc 

 which takes its course through the axil to the hack, where it 

 bifurcates and grows up the branches as described, establishing 

 communication with them at intervals by the formation of small 

 foramina as is usual in compound stems. As the supplementary 

 tubes accompany both jointed tubes it would seem that the 

 branch as well as the stem should become fascicled, but so far as 

 I observed the supplementary tube only proceeds for a very 

 short distance up the base of the hydrocladiate branch, winch 

 remains monosiphonic for the rest of its length, while on the 

 other bianch, the proximal part of which is destined to form part 

 of the stem, the fasciculation is continued upward. It is interest- 

 ing to compare the fasciculation of this species with that of 

 Halicornaria vegoe and 11. tubulifera, in which supplementary 

 tubes originate at the axils and grow down the stem. 



The regularity of the hydrotheca-margin is noticeable. All the 

 teeth are alike except that the anterior one is somewhat larger. 

 Of the two cauline sarcothecse in front of each internode, the 

 lower is further from the hydrocladium than the other, and both 

 are about, in the middle line, so that they form a straight series 

 down the front. The proximal part of a branch may bear as 

 many as fifty sarcotheca^ in line, possibly more. 



The corbula? are commonly borne in rows of four or five. The 

 huge secondary leaflets differ strikingly in the sparseness of 

 their sarcothecse from those of A. calycifera. The lateral spurs 

 support their hydrothecse quite outside the corbula-wall, and are 

 then continued into a large spatula fce process which however may 

 bear only two sarcothecse, with a blunt point between them; 

 towards the end of the corbula they may become much larger, 

 with more sarcothecse. 



Loc— Greal Australian Bight, Long. 126° 45^' E, 190-320 



fathoms ; hong. 130° 40' E, 160 fathoms. 



AGLAOPHENIA CARINIFERA, sp. iiov. 



(Plate xxxviii,, figs. 1-2.) 



Hydrophyton reaching about a foot in height, polysiphonic 

 ( unbranched r ) ; stems divided by oblique joints into internodes, 

 each supporting a hydrocladium. Hvdrocladia long (about an 

 inch), alternate, both series springing from the front, nodes 

 oblique. 



Hydrothecse set at an angle of about 40°, deep, a rudimentary 

 ridge on the adcauline side near the base, continued into a 

 slight intrathecal fold Dearly or quite crossing the basal part of 



