REPORT ON THE RADIOLARIA. 1505 



Dimensions. — Length of the shell (with four joints) Oil. Length of the single joints, a O'OIS, 

 h 0-03, c 0-04, d 0025 ; greatest breadth 0-05. 



Habitat. — Xorth Atlantic (Greenland, depth 1600 fathoms, Ehrenberg), Station 64, surface. 



10. Lithocampe imdtiseriata, Haeekel. 



Eucyrtidiuni multiseriatam, Ehrenberg, 1S72, Jlonatsber. d. k. preuss. Akad. d. Wiss. Berlin, 

 page 293, Taf. vii. fig. 9. 



Shell smooth, spindle-shaped, or slenderly ovate, with three sharp strictures. Four joints of 

 different lengths = 3:4:5:10. The third and fourth joints nearly equal in breadth, and twice as 

 broad as the hemispherical cejihalis. The truncate mouth is slightly constricted. Pores very small 

 and numerous, in regular transverse rows. Three or four rows in the first, five or six in the second, 

 seven or eight in the third, and fifteen to twenty in the fourth joint. 



Dimensions. — Length of the shell (with four joints) Oil. Length of the single joints, a O'OIS, 

 h 0-02, £ 0-025, d 0-05 ; breadth 0-045. 



Habitat. — Tropical Pacific (Philippine Sea, Ehrenberg), Stations 206, 224, 266, in various 

 depths. 



11. Lithocampe diploconu?,, n. sp. (PI. 77, fig. 3). 



Shell rough, doubly conical, with three distinct strictures. Four joints of different lengths = 

 2:5:5:8. The third joint is the broadest. The three first joints form together a broad cone, and 

 the fourtli an inverse truncate cone ; the latter is distinguished by convergent longitudinal ribs. 

 Pores regular, circular, alternating with the ribs in the fourth joint. Truncate mouth hyaline, half 

 as broad as the third joint. 



Dimensions. — Length of the shell (with four joints) 0-2. Length of the single joints, a 0-02, & 0-05, 

 c 0-05, d 0-08 ; breadth (in the middle part) O'l. 



Halitat. — Western Tropical Pacific, Station 225, depth 4475 fathoms. 



12. Lithocam2)e diaphana, Haeekel. 



Eucyrtidiuni diaplianum, Ehrenberg, 1872, Monatsber. d. k. preuss. Akad. d. Wiss. Berlin, 

 p. 309. 



Shell smooth, hyaUne, spindle-shaped, decreasing uniformly towards both poles, with three 

 distinct strictures. Four joints of different lengths ; the second and third equal in breadth, twice as 

 broad and three times as long as the first and the fourth. Pores very small and scarce, in 

 transverse interrupted rows, commonly two rows in the first, two or three in the second, three 

 or four in the thii-d, and only one in tlie last joint. Mouth constricted, two-thirds as broad as 

 the fourth joint. 



Dimensions. — Length of the shell (with four joints) 0-13. Length of the single joints, a 0-015, 

 h 0-05, c 0-05, d 0-015 ; breadth (in the middle part) 0-06, mouth 0-02. 



Habitat. — South Atlantic, Station 335, depth 1425 fathoms. 



(ZOOL. CHALU EXP. PART XL. 1886.) Rr 189 



