REPORT ON THE RADIOLARIA. 309 



PI. 15, fig. 7), three times as broad as the bars ; ten to twelve on the lialf equator. Medullary- 

 shell ellipsoidal (with longitudinal main axis), one-third as broad as the cortical shell. 



Dimensions. — Major axis of the cortical shell 01, minor axis 0'8 ; pores 0-009, bars 0'003 ; 

 axis of the medullary shell 0-03 and 0'025. 



Habitat. — Mediterranean, Smyrna, Haeckel, surface. 



5. Drii2^pida areca, n. sp. 



Cortical shell thin walled, with .smooth surface and regular network ; both its axes bear the 

 proportion of 4 : 3. Pores regular, circular, four times as broad as the bars ; fifteen to eighteen on 

 the half equator. Medullary shell spherical, half as broad as the cortical shell. 



Dimensions. — Major axis of the ellipsoidal cortical shell 0'12 to 014, minor axis O'l to Oil; 

 pores 0-008, bars 0002 ; diameter of the medullary shell 0-05 to 0-06. 



Habitat. — Indian Ocean, off Bombay, Haeckel. 



6. Dru.p2nda ovata, Haeckel. 



Haliomma ovatnm, Ehrenberg, 1854, Mikrogeol, pi. xx. I. fig. 20. 

 Haliomma ovatum, Haeckel, 1862, Monogr. d. Radiol., p. 432. 



Cortical shell thin walled, with smooth surface and regular network ; proportion of both 

 axes = 3:2. Pores regiUar, circular, three times as broad as the bars ; nine to ten on the half 

 equator. Medullary shell spherical, one-third as broad as the cortical shell. 



Dimensions. — Major axis O'OS to O'l, minor axis 0-05 to 0-06 ; pores 0-003, bars O'OOl ; 

 diameter of the medullary shell 0-02. 



Habitat. — Fossil ui the Tertiary rocks of the Mediterranean coast, Greece (Zante), Ehrenberg ; 

 Sicily (Caltanisetta), Haeckel. 



7. Druppula caryota, n. sp. 



Cortical shell thick walled, with rough surface and regular network ; proportion of both axes 

 = 5:4. Pores regular, circular, twice as broad as the bars ; sixteen to twenty on the half equator. 

 Medullary shell ellipsoidal, one-third as large as the cortical shell. 



Dimensions. — Major axis 0-2 to 0-22, minor 0-16 to O'lS, pores 0-008, bars 0-004 ; axes of the 

 medullary .shell 0-07 and 0-055. 



Habitat. — Pacific, central area, Stations 266 to 268, depth 2700 to 2900 fathoms. 



Subgenus 2. DruppuUssa, Haeckel. 



Definition. — Pores of the cortical shell irregular, of differeut form or size, usually 

 subcircular or roundish, sometimes lobed or compound. 



