REPORT ON THE RADIOLARIA. 1507 



16. Lithocampe meta, Stohr. 



Lithommpc meta, StOhr, 1880, PaliBontogr., vol. xxvi. p. 103, Taf. iv. fig. 4. 



Shell rough, subconical, obtuse, with four slight strictures. Five joints of different lengths = 

 2:4:5:4:2. The fourth joint is the broadest, and three times as broad as the constricted mouth. 

 Pores, small, regular, circular, t^uincuncially disposed, equal in size ; two transverse rows in the 

 first and fifth, five rows in the second and fourth, six rows in the third joint. 



Dimensions. — Length of the shell (with five joints) 0"14. Length of the single joints, a 0-017, 

 b 0-033, c 0-04, d 0-033, e 0-017 ; greatest breadth 0-083. 



Habitat. — Fossil in Tertiary rocks of Sicily, Grotte (Stohr), Caltanisetta (Haeckel). 



17. Lithocampe urceolata, n. sp. (PL 77, fig. 2). 



Shell rough, wide, urceolate, without external strictures, but with four internal septal rings 

 (not visible in the figure), each of which contains an internal circle of horizontal pores. Five joints 

 of different lengths = 2:3:6:4:2. The third joint is the broadest, and three times as broad as the 

 constricted mouth. Pores of very different sizes, irregular, roundish, with prominent polygonal 

 frames. A very remarkable species. 



Dimensions. — Length of the shell (with five joints) 0-17. Length of the single joints, a 0-02, 

 b 0-03, c 0-06, d 0-04, c 0-02 ; greatest breadth 0-13. 



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



18. Lithocampe clava, Ehrenberg. 



Litliocamx>e clava, Ehrenberg, 1875, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 66, Taf. iv. fig. 2. 



Shell smooth, club-shaped, or slenderly ovate, with five internal septal rings. Six joints of very 

 different lengths = 5 : 2 : 3 : 4 : 5 : 18. The sixth joint is the broadest, and as long as the five others 

 together. Pores small, circular, in the basal half of the last joint irregular and larger. Constricted 

 mouth as broad as the subspherical, hyaline cephalis. 



Dimensions. — Length of the shell (with .six joints) 0-15. Length of the single joints, a 0-02, 

 b 0-011, c 0-013, d 0-016, c 0-02,/ 0-07. 



Habitat. — Fossil in Barbados. 



19. Lithocampe hexacola, n. sp. (PL 79, fig. 7). 



Shell smooth, nearly spindle-shaped, without external strictures, but with five internal septal 

 rings. Six joints of different lengths = 4:8:5:5:5:10. The fourth joint is the broadest, and four 

 times as broad as the constricted mouth. Pores subregular hexagonal, or irregular polygonal, with 

 thin bars. 



Dimensions. — Length of the shell (with six joints) 0-18, greatest breadth 0-09. Length of the 

 six joints, a 0-02, b 0-04, c, d, and c each 0-025, / 0-05. 



Habitat. — Central Pacific, Station 271, depth 2425 fathoms. 



