REPORT ON THE RADIOLARIA. 1277 



15. Anthocyrtium ehrenbergii, Haeckel. 



Anthocyrtis ehreribergii, Stbhr, 1880, Palaeontogr., vol. xxvi. p. 100, Taf. iii. fig. 21, a, b. 



Shell smooth, with obliterated collar stricture. Length of the two joints = 3 : 10. 

 breadth = 2:8. Cephalis subcylindrical, with an excentric, stout, pyramidal horn of the same 

 length. Thorax bottle-shaped, with small, regular, circular pores of equal size. Mouth little 

 constricted, with twenty to thirty small, triangular, convergent feet, about half as long as the 

 cephalis. 



Dimensions. Cephalis 0'03 long, 0'02 broad ; thorax 01 long, 0'08 broad. 



Habitat. Fossil in Tertiary rocks of Sicily (Grotte), Stb'hr. 



16. Anthocyrtium zanguebaricum, Haeckel. 



Anthocyrtis zanguebarica, Ehrenberg, 1872, Abhandl. d. k. Akad. d. "Wiss. Berlin, p. 285, 

 Taf. ix. fig. 12. 



Shell smooth, with slight collar stricture. Length of the two joints = 3 : 10, breadth = 2 : 7. 

 Cephalis subspherical, with an excentric conical horn of the same length. Thorax slender, ovate 

 or bottle-shaped, with irregular, roundish pores increasing in size downwards. Mouth little con- 

 stricted, with twelve to fifteen small, triangular, convergent feet, about half as long as the cephalis. 



Dimensions. Cephalis 0'03 long, 0'02 broad ; thorax 01 long, 0'07 broad. 



Habitat. Indian Ocean (Zanzibar), depth 2200 fathoms, Pullen. 



17. Anthocyrtium fans, Haeckel. 



Antlwcyrtis Jicux, Ehrenberg, 1875, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 64, Taf. vi. fig. 3. 



Shell rough, with obliterated collar stricture. Length of the two joints = 2 : 12, breadth = 3 : 10. 

 Cephalis conical, with a large, cylindrical horn, pyramidal at the base, about as long as the thorax. 

 Thorax subovate, truncate, papillate, with small, regular, circular, quincuncial pores of the same 

 breadth as the bars. Mouth constricted, two-thirds as broad as the thorax, with fifteen to twenty 

 strongly convergent, lamellar, rectangular or sword-shaped feet, nearly as long as the thorax. 



Dimensions. Cephalis 0'02 long, 0'03 broad ; thorax 012 long, 01 broad. 



Habitat. Fossil in Barbados. 



18. Anthocyrtium flosculus, n. sp. (PL 62, fig. 19). 



Antliocyrtis flosculus, Haeckel, 1881, Prodromus et Atlas, pi. Ixii fig. 19. 



Shell ribbed, with distinct collar stricture. Length of the two joints =1 : 4, breadth = 2 : 4. 

 Cephalis hemispherical, with small, circular pores and a large cylindrical horn, twice as long as 

 the thorax and half as broad at the base as the cephalis. Thorax subovate, truncate, with twenty- 

 four to thirty longitudinal ribs and alternating rows of circular pores. Mouth constricted, two-thirds 



