REPOKT ON THE EADIOLARIA. 1177 



5. Calpophcena jxitalosj^i/ris, ii. sp. 



Shell campanulate, tuberculate, with irregular, roundish pores. Apical horn conical, shorter 

 than tlie shell. (Basal plate with nine pores ?) Corona with twelve to twenty broad, lamellar, 

 truncate, vertical feet, of different sizes, somewhat irregular. 



Dimensions. — Sliell 0'08 long, 0'09 broad; horn and feet 0'07 to 0-12 long. 



Habitat. — Central Pacific, Station 265, depth 2900 fathoms. 



Siil)o;enus 2. Cladocorona, Haeckel, 1881, Prodromus, p. 430. 

 Definition. — Feet branched or forked. 



6. Calpophcena tet)-acoretJira, u. «p. 



Sliell subspherical, smooth, with irregular, roundish pores. Basal plate with four larger pores. 

 Apical horn and the four divergent basal feet of equal size and similar form, three to four times as 

 long as the shell, slender, bristle-shaped, curved, in the distal half irregularly branched. (Very 

 similar to the remarkalile Tctraspi/ris tetracordhra, PL 53, figs. 19, 20, but with shorter appendages 

 and with simple spherical shell, wliich exhibits no trace of sagittal ring and constriction.) 



Dimensions. — Shell 012 diameter, horn and feet 0-.3 to 0'5 long. 



Habitat. — Central Pacific, Station 271, deptli 2425 fathoms. 



7. Calpophmna hexacorethra , n. sp. 



Shell subspherical, smooth, similar to the preceding species. Basal plate with six pores. 

 Apical horn and the six divergent feet twice to three times as long as the shell, bristle-shaped, 

 irregularly curved and branched. (Similar to Hexaspijris hexacorethra, PI. 95, fig. 8, but without 

 sagittal ring and constriction.) 



Dimensions. — Shell Oil long, 01.'^ broad ; liorn and feet 0-2 to 0'3 long. 



Hahitat.-^Gentic&l Pacific, Station 274, deptli 2750 fathoms. 



Genus 525. Archiphcena,'^ Haeckel, 1881, Prodromus, p. 429. 



Definition. — A r c h i p li aj u i d a (vel Monocyrtida multiradiata clausa), with simple 

 internal cavity of the shell, without apical horn and axial columella. 



The genus Archipluena has the same simple cavity of the shell as the preceding 



Calpophcena, but differs from it in the loss of the apical horn. It bears therefore 



to the latter the same relation that Gorgosiyyris does to Petalospyris. The two 



former genera may ha derived from the two latter Ijy loss of the sagittal ring and 



constriction. 



' ArchiplicEna = 'PximoTA\&\. shell ; ajx'j <?«'"«■ 

 (ZOOL. CHALL. EXP. — PART XL. — 1886.) Rr 148 



