HYDROTDA BALE. 29 



P. armnfa, Allman, is an allied species, Allman's figures, 

 which represent the anterior sarcothecte as extremely slender 

 bodies being, according to Billard, unlike the actual structure, 

 which resembles that of P. campanula. The gonothecae are 

 remarkably like those figured by Kirchenpauer, having only four 

 to six sarcothecae disposed in a sinuous line down the dorsum. 

 Dr. Hartlaub does not mention the gonothecae of P. obconica, 

 so it is probable that he did not observe them. If P. libc.onlcn 

 is the same as P. &..$/,//, Kirchenpauer' s figures of the gonotheca 

 must be as incorrect as those of the trophosome, or else it must 

 vary remarkably. 



Both Kirchenpauer and Allman expressly state that the male 

 gonothecae are without nematophores ; those of P. l>usl;'i! 

 have two near the base. 



Loc. Great Australian Bight, 40 to 100 fathoms. 



PLUMULAEIA PROCUMBENS, Spencer. 



Plum id arl<t procumbens, Spencer, Trans. Roy. Soc. Viet., ii., 

 1891, p. 130, pis. xxi. xxiii. Bale, Proc. Roy. Soc. Viet., 

 vi. (N.S.), 1893, p. 115, pi. v., figs 11-12. 



The material included a single specimen of P. p 

 a species which is quite different in habit from any other of the 

 Australian Plumulariae. When in fluid or balsam the hydrocladia 

 are scarcely visible to the naked eye, so delicate and minute are 

 they, but the multitude of small branchlets, springing fi'om all 

 sides of the larger branches, give the zoophyte a peculiar bushy 

 or bristly aspect that is very characteristic. As in most other 

 species the short intermediate internodes of the hydrocladia bear 

 each a ueniatophore, therein differing from the original 

 specimens, collected in Port Phillip by the late Mr. J. B. Wilson, 

 in which, with rare exceptions, these short internodes were 

 unarmed. The pitcher-shaped hydrothecoe are quite minute, and 

 the supracalycine sarcothecaa are in proportion very large, their 

 length being about the same as that of the hydrothecse. 



Loc. Great Australian Bight, 40 to 1 00 fathoms. 



PLUMULARIA ASYMMETRICA, up. nov. 

 (Plate iv., figs 2-3). 



Hydrophyton about two feet in height, polysiphonic, with 

 numerous ascending branches facing in the same direction, each 

 springing from an internode of the primary jointed stem 



