REPORT ON THE RADIOLARIA. 103 



with a coronal of six to nine short and acute spines, not longer than the half diameter of the pore. 

 Xo spines between the pores. 



Dimensiom. — Diameter of the shell 016 to 02, of the pores 002 to 0-03 ; length of the spines 

 0-008 to 0012. 



Habitat. — Fseroe Channel (Gulf Stream), common. Expedition of H.M.S. "Triton," John Murray. 



2. ClioenicosphcBra Jlosctdenia, n. sp. 



Shell spherical, with large circular or roundish pores of different size, three to six times 

 as broad as the bars. Six to eight pores in the half meridian of the shell. Margin of every pore 

 somewhat prominent, with a coronal of ten to twenty parallel acute spines of different length, tlie 

 largest somewhat longer than the diameter of the pore. No spines between the pores. 



DimensioTis. — Diameter of the shell 012 to 015, of the pores 0'02 to 0'04 ; length of the spines 

 002 to 005. 



Habitat. — Central I'acific, Station 272, depth 2600 fathoms. 



Subgenus 2. ChcenicosphcBrimn. 



Definition. — A coronal of spines only around the larger 2:)ores, not around tlie 

 smaller. 



3. Chcenicosphcera nassiterna, n. sp. (PI. 8, fig. 3). 



Shell spherical, with circxxlar or roundish pores of very different size. The smaller pores v(!ry 

 numerous, without coronal of spines, roundish, about as broad as the bridges. Twenty to thirty pores 

 in the half meridian of the shell. Between them, irregularly scattered, a small number (eight to 

 twelve) of very large circular pores, one-third to one-half as broad as the radius of the shell, armed 

 with a coronal of six to nine parallel, straight, acute spines, about half as long as the radius of 

 the shell 



Dimensions. — Diameter of the shell 01 to 013, of the smaller pores 0'002 to O'OOl, of the 

 larger armed pores 0'02 to O^OS ; length of the spines O'OS to O^Ol. 



Habitat. — Philippine Islands, Mindanao, Station 213, depth 2050 fathoms. 



4. Clicenicosphcera Jlammahunda, n. sp. (PI. 8, fig. 5). 



Shell spherical, with circular or roundish pores of very different size. The smaller pores very 

 numerous and unequal, very irregularly scattered, hardly one-fourth to one-half as broad as the 

 bridges between them. Twelve to twenty-four pores in the half meridian of the shell. Between 

 them, irregularly scattered, a variable number (ten to twenty) of very large circular pores, about one- 

 fourth as broad as the radius of the shell. The margin of these large pores is armed with a very 

 irregular coronal of four to twelve unequal, curved acute spines, partly simple, partly branched like 



