REPORT ON THE RADIOLARIA. 1273 



2. Anthocyrtium centaurea, Haeckel. 



Anthocyrtis mespilus, var. major, Ehrenberg, 1875, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 66, 

 Taf. vL fig. 5. 



Shell smooth, with sharp collar stricture. Length of the two joints = 2:6, breadth = 3:7. 

 Cephalis hemispherical, with irregular, roundish pores, and a very large pyramidal horn, longer than 

 the shell, with contorted edges. Thorax hemispherical, with six to eight transverse rows of regular, 

 circular pores of equal size. Mouth little constricted, with fifteen to twenty divergent, curved, 

 slender feet, about as long as the shell. 



Dimensions. Cephalis 0'02 long, 0'03 broad ; thorax 0'06 long, 0'07 broad. 



Habitat. Fossil in Barbados. 



3. Anthocyrtium anthemis, n. sp. 



Shell papillate, with obliterated collar stricture. Length of the two joints = 1:3, breadth = 1:3. 

 Cephalis hemispherical, with very small and scarce pores, and a conical horn of the same length. 

 Thorax conical, as long as broad, with conical papillae, and eight to ten transverse rows of roundish 

 pores, gradually increasing in size downwards. Mouth scarcely constricted, with fifteen to twenty 

 divergent, straight, conical feet, half as long as the thorax. 



Dimensions. Cephalis 0'03 long, 0'04 broad ; thorax 0'09 long, O09 broad. 



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



4. Anthocyrtium collar e, Haeckel. 

 Anthocyrtis collaris, Ehrenberg, 1875, AbhandL d. k. Akad. d. Wiss. Berlin, p. 64, Taf. vi. fig. 8. 



Shell rough, conical, with obliterated collar stricture. Length of the two joints = 3:5, 

 breadth = 4:7. Cephalis conical, with a pyramidal horn of the same length, and with two 

 transverse rows of rather oblong, narrow pores. Thorax truncate, conical, in the lower part thorny, 

 with six to eight transverse rows of regular, circular pores, increasing in size downwards. 



Dimensions. Cephalis 0'03 long, 0'04 broad ; thorax 0'05 long, 0'07 broad. 



Habitat. Fossil in Barbados. 



5. Anthocyrtium adonis, n. sp. (PI. 62 fig. 20). 



Shell rough, with sharp collar stricture. Length of the two joints = 3 : 10, breadth =4 : 12. 

 Cephalis subspherical, with very small circular pores, and a very long, straight cylindrical, horn, twice 

 to three times as long as the shell. Thorax inflated, ovate, or subspherical, with small regular, circular, 

 hexagonally-framed pores. Mouth strongly constricted, half as broad as the thorax, with fifteen to 



(ZOOL. CHALL. EXP. PART XL. 1886.) Rr 160 



