282 KI'X'OHDS OF THE AUSTllALIAN MUSEUM. 



COLLOSPH.ERA IIKDLEYI, sj). UOV. 



(Plate liiL, % 6). 



The tests are nearly completely spherical, with a number of 

 short tubes irregularly scattered among small apertures which are 

 less than half the diameter of the intermediate spaces. The tubes 

 are never dilated externally, but always gradually decrease in 

 diameter distally. There are about ten of them in each hemi- 

 sphere, and about fifteen or sixteen of the small apertures in each 

 half meridian. The intra-capsular protoplasm occupies only a 

 small part of the space enclosed by the shell (about half the dia- 

 meter). There are numerous Algaj within the shell. The diameter 

 of the shell is -09 mm. The length of the tubes is -012; and 

 their width at the base about the same. The small apertures are 

 •005 mm. or less. 



This species is distinguished from <S'. socia/is, Haeckel, by the 

 greater number of the tubes and the smallness of the (jther aper- 

 tures. S.fragilis, Haeckel, which was obtained at the "Chal- 

 lenger" Station 165, differs widely in having tubes all over the 

 surface. 



C0LLOSPH.ERA GLOBULARls, Haeckel, 

 Collosphcera glohularis, Haeckel, The Radiolaria, Chall. Rep., 

 Zool,, xviii., 1887, p. 94. 

 One specimen of this widely-distributed species. 



COLLOSPH.ERA HUXLEYI, ./. MuUeV. 



Colloi<phwra huxleyi (J. Miiller), Haeckel, Die Radiolarien, Eine 

 Monographie, 1862, p. 534, pi. xxxiv., figs. 1-11 ; The Radio- 

 laria, Chall. Rep., Zool., xviii,, 1887, p. 96. 

 (Several specimens. 



COLLOSPH^RA UNIFORIS, sp. UOV. 



(Plate liii., fig. 7). 



The tests in this species are nearly regular, thin-walled spheres, 

 perforated by rounded apertures, about ten in the half meridian, 

 the intervals, for the most pai*t broader than the apertures. 

 There is usually only one lai-ger well-defined circular apertui'e 

 with a raised margin ; sometimes there ai-e two of these larger 

 apertures. They obviously correspond to the tubes of Siphono- 

 sphtera, but are much less prominent. The tests are 0-06 mm. in 

 diameter ; the small apertures about 0*05 mm., intervals about 

 0"01 mm. ; the larger apertures 0-01. 



In the presence of the single larger aperture this species 

 resembles C. pyriformis, Haeckel, but differs widely from it in 

 the shape and size of the test and the dimensions of the aper- 

 tures. 



