280 RECORDS OF THE AUSTRALIAN MUSEUM 



Rhaphidozoum pandora, Haeckel. 

 Bhaphidozoum 'pandora, Haeckel, The Radiolaria, Chall. Rep., 

 Zool., xviii., 1889, p. 49, pi. iv., fig. 6. 



Several specimens were obtained of a Rhap)hidozoum which 

 agrees closely with Haeckel's definition and figures oi R. pandora, 

 the only difference being that the acicular spicules are somewhat 

 stouter. The intra-capsular plasm is coarsely granular, and 

 usually contains a small number (1-6) of large nuclei, though in 

 a few cases there are a larger number. In zooids with a single 

 nucleus there is a rounded oil-globule : in those with several 

 nuclei this has become irregular, sometimess branched. The few 

 Xanthellae that are present are all closely applied to the capsular 

 membrane. Masses of granules (microspores ?) of the same char- 

 acter as those observed in Collozoum alpha, all smaller than the 

 zooids, occur superficiall)^ here and there, some actually projecting 

 or the surface. 



One specimen differs from the others in having the spicules 

 more strongly spinose, the connecting shafts of the geminate 

 spicules sometimes being beset with spines, and the spines of a few 

 of the spicules having short branches. 



The " Challenger " locality is South Atlantic near Ascension 

 Island. 



Rhaphidozoum brandtii, sp. nov. 



The spicules consist of ( 1 ) exceedingly fine, smooth, needle-like 

 spicules (2) 4-5 rayed spicules. The former are mostly aggregated 

 in such a way as to form a layer investing each capsule. Of the 

 latter there are two distinct varieties, smaller, which are smooth, 

 and larger, which are spinose towards the ends of the branches. 

 The capsules are large (about 0*15 mm). The needle-like spicules 

 are from "IS to "3 mm. The largest of the rayed spicules are of 

 comparatively gigantic dimensions, each ray being nearly 0"2 mm, 

 in length. 



From R. acuferum, Haeckel, this species differs in having the 

 needle-like spicules smooth and straight. From R. arachnoidcs, 

 to which it is also allied, it differs in having the radiate spicules 

 spinose and the needle-like spicules straight, not curved. 



SPHiEROZOUM QUADRIGEMINUM, Haeckel. 



SphcBrozo^un quadrigeminum, Haeckel, The Radiolaria, Chall. 

 Rep., Zool., xviii., 1887, p. 44. 



