REPORT ON THE RADIOLARIA. 1063 



Apical horn slender, spindle-shaped, about as long as the shell. Twenty to twenty-five feet, of the 

 same length, broad, lamellar and truncate, nearly vertical, slightly divergent. 



Bimmisions. — Shell 0-OG long, O'l broad ; horn and feet 0'05 to 0-07 long. 



Hahitat. — Fossil iu Barbados. 



12. Petalosj>yris papillata, n. sp. 



SheU nearly cubical, papillate, without external sagittal stricture, with small, irregular, roundish 

 pores. Basal plate with six pores (three larger and three alternate smaller). Apical horn conical, 

 half as long as the shell. Feet twenty to thirty, one-half to one-third as long, conical, divergent. 



Dimensions. — SheU diameter 0-09 ; horn O'Oi long, feet 0-03 to 0'05 long. 



Hahitat. — North Atlantic, Station 353, depth 2965 fathoms. 



13. Petalospyris dictyocuhus, n. sp. (PI. 86, fig. 6). 



Shell nearly cubical, smooth, without external stricture, but with a complete, parietal, square, 

 sagittal ring. On each side of the rmg four pairs of larger pores, whilst the lateral pores are 

 smaller and more numerous. Basal plate also with four pairs of larger pores and smaller lateral 

 pores. Apical horn and -basal feet short, pyramidal, scarcely one- fourth as long as the shell. The 

 three primary feet are larger than the sLx to nine secondary feet. 



Dimensions. — Shell diameter O'OS ; horn and feet 0'02 long. 



Habitat. — Central Pacific, Station 274, surface. 



14. Petalospyris hellidiastrum, n. sp. 



SheU nut-shaped, tuberculate, with sUght sagittal stricture and irregular, roundish pores. Basal 

 plate with twelve pores (four central larger and eight peripheral smaller pores). Apical horn 

 slender, conical, about as long as the sheU (sometimes ramified at the distal end). Feet sixteen to 

 twenty, broadly lamellar, truncate, divergent, about as long as the sheU. 



Dimensioiis. — SheU 0'08 long, O'l broad; horn and feet 0-07 to 0'09 long. 



Habitat. — Central Pacific, Station 265, depth 2900 fathoms ; also fossU in Barbados. 



15. Petalospyris dinoceras, n. sp. (PL 87, fig. 12). 



SheU nut-shaped, mammUlate, without external stricture, but with complete external sagittal 

 ring. Pores subregular, circular. Basal plate with four large central pores, surrounded by a circle 

 of twelve to twenty smaU peripheral pores. Apical horn very large, spincUe-shaped, one and a half 

 times as long as the sheU. Feet twenty-five to thirty, broadly lamellar, truncate, divergent, about 

 as long as the sheU. 



Dimensions. — SheU O'll long, 0'13 broad ; horn 0-15 long, feet 0'09 long. 



Habitat. — Central Pacific, Station 272, depth 2600 fathoms. 



