REPORT ON THE RADIOLARIA. 1419 



15. Theocorys tuberculata, n. sp. 



Shell almost ovate, tuberculate, with deep collar, but slight lumbar stricture. Length of the 

 three joints =2 : 5 : 12, breadth = 3: 8 : 11. Cephalis hemispherical, with a cylindrical horn of 

 twice the length. Thorax hemispherical, with regular, circular, double-edged, quincuncial pores, 

 between which conical tubercles occur. Abdomen truncate, ovate, twice as broad as the constricted 

 mouth, with regular, circular, hexagonally-framed pores, three to four times as broad as those of 

 the thorax. 



Dimensions. Length of the three joints, a 0'02, b 0'05, c 012 ; breadth, 0'03, b O08, c Oil. 



Habitat. Tropical Atlantic, Station 348, depth 2450 fathoms ; fossil in Barbados. 



16. Theocorys martis, n. sp. 



Shell slender, ovate, with two deep strictures. Length of the three joints = 3 : 6 : 18, breadth 

 = 4:8:12. Cephalis small, hemispherical, with a very large, sword-shaped broad horn, nearly as 

 long as the whole shell. Thorax hemispherical, honey-comb like, with regular, circular, hexagon- 

 ally-framed pores. Abdomen ovate, with irregular, roundish, very large pores, four to six times as 

 broad as the bars, and as the pores of the thorax. Constricted mouth half as broad as the 

 abdomen. 



Dimensions. Length of the three joints, a 0'03, b 0'06, c 018 ; breadth, a 0'04, b 0'08, c 012. 



Habitat. South Pacific, Station 295, depth 1500 fathoms. 



17. Theocorys mercurii, n. sp. 



Shell ovate, conical, with two slight strictures. Length of the three joints = 1:3:7, breadth 

 = 2:4:7. Cephalis hemispherical, with a broad pyramidal horn of the same length. Thorax 

 campanulate, with longitudinal series of small, regular, circular pores, separated by divergent crests. 

 Abdomen nearly spherical, one and a half times as broad as the ( constricted mouth, which is pro- 

 longed into a thin, solid, cylindrical peristome. Pores of the abdomen regular, circular, hexa- 

 gonally framed, three to four times as broad as the bars, and as the pores of the thorax. 



Dimensions. Length of the three joints, a 0'02, b 0'06, c 015 ; breadth, a - 04, b 0'09, c 015. 



Habitat. South Atlantic, Station 338, depth 1990 fathoms. 



18. Theocorys minervce, n. sp. (PI. 69, fig. 14). 



Shell ovate, conical, with two deep strictures. Length of the three joints = 1:3:4, breadth = 

 1:4:5. Cephalis subspherical, with a large pyramidal horn as long as the thorax, and with 

 small, circular pores. Thorax rough, with regular, quincuncial, circular pores, three to four times 

 as large as those of the cephalis. Abdomen barrel-shaped, with irregular, roundish pores of very 

 different sizes, six very large pores immediately beyond the lumbar stricture, and four to five rows 



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