358 Froceedings of the lloi/al Frisk Academy. 



calcareous, with alternate homy and limy rings, flexible, yellowish. The 

 cortex is fairly thick. The verrucae project as pointed cones only in the 

 upper portion. They occur on the sides of the stem in quincunx, in several 

 rows, leaving a narrow, shallow, smooth space, which gradually becomes 

 narrower till it disappears in the terminal portion. 



The spicules are like those of macnlata, namely, spiny double-clubs and 

 spindles (0-06). 



Loceili/)/. — Mermaid Straits, 50 fms. 



Eidley (xxxiii., p. 348), in identifying a specimen in the "Alert" 

 Collection with E. calamus, gives the following notes: — 



A specimen 9 inches (225 cm.) long; incomplete. The colour is dark 

 brick-red. The fusiform spicules were almost twice as long as tliose of 

 Studer's .specimen. He says nothing of tlie dimensions of the double-clubs. 



Locality. — Port Deuison, Queensland, 4 fms. 



The following notes from the " Challenger " specimen in the British 

 Museum (fig. lOS) may be of interest :— The fragment is 50 mm. in length, 

 and has a diameter varying from .3-5 mm. at the base and 2 mm. near the tip. 

 The coenenchyuia is about 1 mm. in liiickness tliroughout ; the canal system 

 is typical t>f the group, and there are two distinct main canals which define 

 two longitudinal bare sjiaces, although Wrigiit and Studer refer to only "a 

 very narrow median groove." 



The iM)ly]« are disposed in two longitudinal series ; but a torsion of the 

 whole colony lioa resulted in a false sjiiral appearance. The verrucae are 

 small and dome-like ; some are adprcssed to the stem; while others are almost 

 retracted within the coenenchymo. 



The axis is of the typical Junccllid stnicturc. 



Wright and Studer thus define the spicules, of which the chief types are 

 shown in lig. 109 : — 



"The spicules consist of (1) salmon-coloured spindles, 012 x 004 mm.; 

 0-08 X 002 mm. (2) sherry-coloured double-clubs : 01 X 006 mm.; 006 x 

 004 mm. (3) Ncctlles: 006 x 002 mm. 



Localitij. — Banda Islands. 



Note. — Fig. 110 of the Torres Straits specimen of Juncclla gemmacea, which 

 was originally described as Ellisclla maculata, has been added here to 

 illustrate convergence in the group, and show how futile it is to attempt to 

 separate Juncellids into genera without an examination of the spicules. 



XXX. Scirpearia qnadrilineata n. sp. Figs. 111-11.'^. 



It ha.s l>een found ne<'fH.iary to cntabiisli this now spocios to include a very 

 distinctive sj)e(iuie!i in wliith the most predominant feature is the presence 



