REPOKT ON THE RADIOLAEIA. 297 



4. EUipsoxiphus claviger, n. sp. (PL 14, fig. 3). 



Xipliosphcera clavigera, Haeckel, 1881, Predromus et Atlas. 



Proportion of the major axis to the minor = 5:4. Shell thick walled, with irregular network ; 

 meshes roundish or circular, double contoured, of unequal size, twice to four times as broad as the 

 bars ; eight to ten on the half equator. Polar spines club-shaped, with prominent edges, about as 

 long as the minor axis ; thicker in their middle part than at both ends (diflers from Xiphosphcera 

 clavigera by the ellipsoidal form of the shell, and the double length of the spines). 



Dimensions. — Longer axis OlS, shorter axis 012 ; pores 0'007 to O'Olo, bars 0-004 ; lengtli of 

 the polar spines 0'12, thickness in the middle part 0-02-. 



Habitat. — Central area of the Pacific, Station 272, depth 2600 fathoms 



5. EUipsoxiphus suessi, Dimikowski. 



Ellipsoxipli-us suessi, Dunikowski, 1882, Deukschr. d. k. Akad d. Wiss. Wien, Bd. xlv. p. 26, 

 Taf. V. tig. 50. 



Proportion of the major axis to the minor = 7: 5. Shell thick waUed, with irregular, roundish 

 meshes, six to eight on the half equator, twice to three times as broad as the bars. Polar spines 

 nearly cyhndrical, blunt, as long as the major axis. 



Dimensions. — -Longer axis 014, shorter axis 01 ; pores O'OIS to 0'023, bars O'Ol ; length of the 

 polar spines 012, thickness of them 0'0.35. 



Habitat. — Fossil in the Alpine Lias, Schafberg near Salzburg, Dunikowski. 



6. Ellipsoxijphus parvoforamin ns, Dunikowsk\ 



EUipsoxiphus par>mforaminas, Duuikovvski, 1882, Denkschr. d. k Akad. d Wi^s. Wisn, Bd. xlv. 

 p. 26, Taf. V. fig. 51. 



Proportion of the major axis to the minor = 7: 6 Shell thick walled, with irregular, roundish 

 or oval meshes, ten to twelve on the half equator, scarcely as broad as the bars. Polar spines 

 coiucal, shorter than the minor axis. 



Dimensions. — Longer axis 014, shorter axis 012 ; pores 0'016 to O'Ol, bars O'Ol to 0'02 length 

 of the polar spines O'l, basal thickness 0'045. 



Habitat.— Fossil in the Alpine Lias, Schafberg near Salzburg, Dunikowski. 



7. EUipsoxiphus hipolaris, n. sp. (PI. 14, fig. 11). 



Xiphosplioera bipularis, 1881, Prudromus et Alias. 



Proportion of the major axis to the minor = 8:7. Shell thick waUed, with irregular, roundish 

 meshes, twice to three times as broad as the bars ; sixteen to twenty on the half equator. Polar 

 spines short and thick, three-sided pyramidal, scarcely half as long as the shorter radius of the 

 shell ; surrounding the base of every spine is a circle of eight to nine shorter spines. 



Dimensions. — Longer axis 0'08, shorter axis 0'07 ; pores O'OOS to 0-007, bars 0'002 ; length of 

 the polar spines 0-02 to 0'0.3, basal thickness 0'02. 



Habitat. — Tropical part of the Western Pacific, Station 225, depth 4475 fathoms. 



(ZOOL. CHALL. EXP. PART XL. 1885.) Rl 38 



