EL^ORHANIS. 47 



Genus 8. EL^ORHANIS Greeff. 

 Elxorhanis G-reeff Sitzber. Ges. Marburg, 1873, p. 57. 



Body spherical ; outer envelope composed of silicious 

 grains and diatom f rustules ; plasma containing a large 

 oil globule but no food particles ; nucleus single, placed 

 eccentrically; a contractile vesicle usually present; 

 pseudopodia tenuous, non-granuliferous. 



E. oculea is the only species of this genus ; the 

 identity of E. arenosa with Litliocolla globoaa has been 

 noticed above, as has also the affinity of this to the 

 preceding genus Litliocolla. 



1. Elaeorhanis oculea (Ai'cher). 

 (Text-fig. 189.) 



Cystoplirys oculea 

 Aechbb. Qrt. Jrn. Micr. Sci. (n.s.) IX, 1869, p. 265, pi. xvii, f . 3 ■ op 

 cit. X, 1870, p. 112. 

 Elseorhmiis cincta 



Geeeff Sitzber. Ges. Marburg, 1873, p. 57 ; Arch. mikr. Anat. XI, 



1875, p. 23, pi. i, f . 10. 

 Pbnard Heliozoaires, 1904, p. 222, figs. 



Body enclosed in a spherical membrane surrounded 

 by liquid ; outer investment spherical or ellipsoidal 

 composed of diatom frustules and sand grains cemented 

 together by a grey coloured mucilage ; plasma bluish 

 in colour containing a large yellow oil globule without 

 any food particles ; nucleus single, placed eccentrically, 

 containing a single nucleolus ; one or more contractile 

 vesicles usually present ; no central granule observed ; 

 pseudopodia of moderate length, rigid, without central 

 axes, occasionally forked, non-granuliferous ; habit 

 colonial when young and solitaiy when mature. 



Diameter of outer envelope in adult individuals -50 fj. 

 to 60 ju, ; diameter of body about half that of the 

 envelope ; young individuals with outer membranes 

 from 7 /A in diameter and upwards ; embryos in colonies 

 about 4 fji in diameter. 



