REPORT ON THE RADIOLARIA. 1513 



3. Cyrtocapsa inftata, n. sp. 



Shell spiny, pear-shaped, with three deep strictures. The inflated third joint is twice as long 

 as the second and fourth joints, and three times as long as the hemispherical cephalis, which bears a 

 large conical horn of three tunes the length. Fourth joint flat, vaulted, inversely cap-shaped. The 

 third joint is the broadest, being twice as broad as long. Pores regular, circular, double-contoured. 



Dimensions. Length of the shell 014, breadth Oil. Length of the single joints, a 0'02, 1 0'03, 

 c 0-06, d 0-03. 



Habitat. North Pacific, Station 244, depth 2900 fathoms. 



4. Cyrtocapsa pyrum, n. sp. (PI. 78, fig. 8). 



Shell thorny, pear-shaped, without external strictures, but with three internal annular septa. 

 Length of the four joints = 2:5:6:7. The fourth joint is the broadest, being about twice as broad 

 as long, and hemispherical. The small subspherical cephalis bears a stout conical horn of the 

 same length. Pores large, regular, circular. 



Dimensions. Length of the shell (with four joints) 0'2, breadth 012. Length of the single 

 joints, a 0'02, b 0'05, c 0'06, d 0'07. 



Habitat. Central Pacific, Station 268, depth 2900 fathoms. 



5. Cyrtocapsa cornuta, n. sp. (PI. 78, fig. 9). 



Shell rough, very thick-walled, nearly pear-shaped, with three annular strictures ; the second of 

 which is very sharp, the first and third slight. Length of the four joints = 3:4:5:6. The third 

 joint is the broadest, being about twice as broad as long ; the fourth joint is hemispherical. Cephalis 

 subspherical, with a large, conical, curved horn of twice the length. Pores regular, circular, hexa- 

 gonally framed. 



Dimensions. Length of the shell (with four joints) 018, breadth 012. Length of the single 

 joints, a 0'03, b 0'04, c O'Oo, d 0"06. 



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



6. Cyrtocapsa diploconus, n. sp. (PI. 78, fig. 6). 



Shell rough, doubly conical, with three annular septa. Length of the four joints = 3:4:4:8. 

 The third joint is the broadest, two and a half times as broad as long ; the fourth is inversely conical, 

 acute. Cephalis hemispherical, with a pyramidal horn of the same length. Pores irregular, roundish. 



Dimensions. Length of the shell (with four joints) 019, breadth 01. Length of the single 

 joints, a 0'03, b 0'04, c 0'04, d 0'08. 



Habitat. Tropical Atlantic, Station 347, depth 2250 fathoms. 



(ZOOL. CHALL. EXP. PABT XL. 1886.) El 190 



