REPORT ON THE RADIOLARIA. 1051 



1. Cantharosjvjris carahus, n. sp. 



Shell nut-shaped, with deep sagittal stricture and irregular roundish pores. Basal plate with 

 six larger pores. Six feet of different sizes, cylindrical, curved ; three primary feet (one caudal and 

 two pectoral) about as long as the shell and twice as long as the three secondary feet. 



Dhnensions. — Shell 0-08 long, 012 broad ; feet 0-05 to 0-09 long. 



HaUtat. — Tropical Atlantic, Station 338, depth 1990 fathoms; Central Pacific, Station 268, 

 depth 2900 fathoms. 



2. Cantharospyris ateuchus, Haeckel. 



Ceratospyris ateuchus, Ehrenberg, 1875, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 66, Taf. xxi. 

 fig. 4. 



Shell nut-shaped, tuberculate, with slight sagittal stricture and unequal circular pores. Basal 

 plate with six larger pores. The two pectoral feet very large and stout, four to six times as long 

 as the shell, widely divergent, curved. The four other feet much smaller and thinner, about as 

 long as the shell. 



Dimensions. — SheU O'OG long, O'OS broad ; length of the two larger feet 0-2 to 0-3, of the four 

 smaller 0-05 to 0-07. 



Habitat. — Fossil in Barbados. 



3. Cantharospyris radicata, Haeckel. 



Ceratospyris radicata, Ehrenberg, 1847, Monatsber. d. k. preuss. Akad. d. Wiss. Berlin, p. 43; 



MikrogeoL, 1854, Taf. xxii. fig. 37. 

 Haliomma radicatum, Ehrenberg, 1844, Monatsber. d. k. preuss. Akad. d. Wiss. Berlin, p. 83. 

 Fefalospyris radicata, Haeckel, 1862, Monogr. d. EadioL, p. 295. 

 Petalospyris radicata, Stohr, 1880, Palseontogr., vol. xxvi. p. 79, Taf. iii. fig. 11. 



Shell nut-shaped, smooth, with slight sagittal stricture and irregular roundish pores ; two 

 larger pores on each side of the ring. Basal plate with sLx pores (?). Six feet of equal size 

 and similar form, conical, divergent, slightly curved, shorter than half the riag. 



Dimensions. — SheU 0-05 long, O'OS broad ; feet 0-02 long. 



Habitat. — Fossil in Barbados and SicUy. 



4. Cantharospyris platyhursa, n. sp. (PI. 53, fig. 7). 



Platylursa compressa, Haeckel, 1881, Prodromus, p. 429; Atlas, pi. 53, fig. 7. 



Shell smooth, nearly discoidal circvilar, markedly compressed in the sagittal direction, with slight 

 basal stricture. Pores very numerous, irregular polygonal, with thin bars. Basal plate with four 

 very large pores. Six feet short, conical, nearly horizontally expanded. Two sagittal feet (caudal 



