REPORT ON THE RADIOLARIA. 11(59 



1. Halicahjptra virginiea, Ehronberg. 



Halicali/jifm rhr/inira, Elirenberg, 1854, Jlikrogeol., Taf. xviii. fig. 110.' 



Halicahjpira viir/inira, Haeckel, 18G2, j\Ionogr. d. Radiol., p. 289. 



Haliomma virginicum, Ehrenberg, 1844, Monatsber. d. k. preuss. Akad. d. Wiss. Berlin, p. 71. 



Acrocalpis virginica, Haeckel, 1881, Prodromus, p. 427. 



Shell smooth, cainpanulate, nearly hemispherical. Pores subregular circular, about as broad as 

 the bars. Horn conical, half as long as the shell. Peristome scarcely constricted, with six conical 

 divergent feet, as long as the horn. 



Diimnsions. — Shell diameter 0'04 to 0-05, length of the feet 0'02. 



Habitat. — Fossil in tertiary rocks of Barbados and North America (Richmond, Virginia). 



2. Halicahjptra canipanula, ii. sp. 



Podoojrtis qjinosa, Bury, 1862, I'olycystius of Barbados, pi. xvii. fig. 3. 



Shell smooth, campanulate. Pores irregular, roundish, about as broad as the bars. Horn large 

 conical, about as long as the shell. Peristome not constricted, with six large divergent feet, which 

 are as long as the shell, lamellar, with dentate edges. 



Dimensions. — Shell diameter 0'07, length of the feet 0"07. 



Halitat. — Fossil in Barbados. 



3. Halicalyptm amp)ulla, n. sp. 



Petalospyris fuoeulata, var., Bury, 1862, Polycystins of Barbados, pi. ix. fig. 1. 



Shell smooth, subspherical, inflate. Pores regular, circular, twice as broad as the bars. Horn 

 slender conical, about as long as the shell. Peristome constricted, with six divergent cylindrical, 

 irregularly curved feet, twice to three times as long as the shell. 



Dimensions.- — Shell diameter 0'12, feet 0"2 to 0'3 long. 



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



4. Halicalyptra novena, n. sp. 



Shell smooth, campanulate. Pores irregular, roundish. Horn slender conical, about as long as 

 the shell. Peristome slightly constricted, with nine slender divergent feet of the same length. 

 (Very similar to Petalospyris foveolata, Ehrenberg, but without internal columella and ring, with 

 perfectly simple shell-cavity and open mouth.) 



Dimensions. — Shell 0'09 diameter, feet 0*1 long. 



Habitat. — Fossil in Barbados. 



5. Halicalyptra petalospiyris, u. sp. (PL 98, fig. 12). 



Shell smooth, campanulate. Pores small, circular, irregularly scattered. Horn stout, 

 pyramidal, about as long as the shell. Peristome scarcely constricted, with fifteen to twenty broad 



(ZOOL. CHALL. EXP. PART XL. — 1886.) Rl 147 



