a pair are in contact in front only at tiie lower part, and the basea 

 of the hydrothocae. as well as the ti-ansverse ridfjes, i-nii obliquely 

 to the axis of the hv(li(!C'anlns. In N. furfniiafa the hydrothecae are 

 more erect in thr \n\\vv part, the main divergence being: above the 

 rid<re. which is at right angles to the axis of the hydrocaidns. The 

 vertical ridge where the two hydrothecae meet is not continued down- 

 ward in S. loeidosa as it often is in .S'. turhinata. The mouth in 

 ;S'. loculosa is upward-directed, with distinct lateral teeth, while in 

 the other form it huiks ratlier dnwuward. and the lateral teeth or 

 lobes are but fcel)ly di'vclopc'd. 



The intern(j(lcs in N. i iirhiiutta aic separated Ijy simple nodes, 

 transverse or very slightly obli(|ue, whieh are usually very close 

 above the hydrothecae. Tn S. loculoxa similar nodes exist, but in 

 addition to and above them there are found at irregular intervals 

 oblique nodes, in which the base of the upper internode runs down 

 into a point in front, while the top of the lower one is jiroduced 

 upwai-d into a similar point at the back. Such double joints may occur 

 between most of the hydrothecal inter nodes on a shoot, or there may 

 be only one or two of them, and the straight ones vary a good deal 

 in distinctne.ss. The effect is that the short section of hydrocaulus 

 between them constitutes a separate internode, as AYarren justly 

 describes it, and the condition is exactly similar to that of many 

 species of Phi niularia. in which the short intei'mediate internode 

 is separated from the liydrothecal internode above by a long i)l)lique 

 joint, and from that below by a straight ti'ansvei'se one. often less 

 distinct. The only diffei'ence is that in Vhntinhiria the short intei-- 

 mediate intei'Tiodes are of regular occurrence, while heie thev are 

 irregula)'. 



Tn botli S. Jomloftd and N. t urhnuifa one or two internodes — 

 usually oidy one — at the summit of a slioot may be vei-y nmch 

 elongated below the hydrothecae. but the hydrothecae themselves are 

 not longer than those found elsewheie. In some specimens of 

 S. locnlom ("Catalogue." pi. iv.. fig. 6) the hydiothecae are less 

 squat than usual, with the teetii less ol)tuse. a variation which 

 appi-oximates tlieni to .S'. iiKin/iimtd . but not to S. t-nrhiiuifa . 



Warren finds S. lomlosa common on the Xatal coast, and his 

 detailed description leaves no doubt of its identity Av^th the common 

 Australian foi-m. Oidy in the gonangia is any difference indicated, 

 the Xatal form having from seven to nine annulations. while my 

 specimens liave only five. The difference may possibly be sexual ; 

 Wai-ren's figured specimen was female, but he does not state whethei- 

 the male was nl)seived ; my specimens were empty, and in onlv 

 two of Them have I sei'n the tronan«ria at all. 



