REPORT ON THE RADIOLARIA. 1455 



about as long as the shell. Length of the four joints = 2:3:5:8. Cephalis subspherical, with a 

 stout, pyramidal horn of twice the length. Pores regular, circular. 



Dimensions. — Length of the shell (with four joints) 0-18, basal breadth 0-08. Length of the 

 single joints, a 002, b 0-03, c 0-05, d O'OS. 



Habitat. — Central Pacific, Station 273, depth 2350 fathoms. 



2. Stichophormis lucerna, n. sp. 



Shell slenderly pyramidal, with three annular septa and six prominent radial ribs, which arise 

 from the second stricture, and are prolonged over the mouth into six free, divergent, cylindrical 

 feet, half as long as the shell. Length of the four joints = 1:2:3:15. Cephalis hemispherical, 

 with a prismatic horn of the same length. Pores in the first and second joints very small and 

 scarce, in the third campanulate joint circular, hexagonally framed, in the colossal fourth joint very 

 large, polygonal (each about as large as the third joint). 



Dimensions. — Length of the shell (with four joints) 04, basal breadth 0-2. Length of the 

 single joints a 0-02, b 0-04, c 0-06, d 0-3. 



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



3. Stichophormis cornutella, n. sp. (PL 75, fig. 9). 



Shell slenderly conical, with nine annular strictures and six longitudinal divergent ribs, which 

 arise in the middle of the shell (from the sixth or seventh stricture), and are prolonged over the 

 wide mouth into six slender bristle-shaped feet, about half as long as the shell. The bases of the 

 feet are connected by arcades of lattice-work. All ten joints have nearly the same length and 

 regular hexagonal pores (in the first and second joints circular). Cephalis hemispherical, witli a 

 very large curved horn, nearly half as long as the shell, and on one side decurrent to the fourth or 

 fifth joint. 



Dimensions. — Length of the shell (with ten joints) 0'16, of each single joint about 0'016 ; basal 

 breadth 0-07. 



Habitat. — North Pacific, Station 253, depth 3125 fathoms. 



Subgenus 2. Stichophormiscus, Haeckel. 



Definition. — Shell with nine prominent radial ribs, which are prolonged over the 

 mouth into nine (sometimes eight or ten) divergent free feet. 



4. Stichophormis novena, n. sp. (PL 79, fig. 9). 



Shell slenderly conical, very similar to the preceding, but with eleven annular strictures and nine 

 divergent ribs, which arise from the tenth or eleventh stricture, and are prolonged over the wide 

 mouth mto nine bristle-shaped feet, half as long as the shell. The length of the twelve joints 

 increases gradually; the tenth is twice as long as the sixth. Pores regular, circular. Cephalis 



