REPORT ON THE RADIOLARIA. 1387 



ovate pores (six to eight in one row), and with a coronal of twelve to fifteen divergent, slender, 

 curved feet, as long as the cephalis. (In the fignre of Ehrenberg, seen half from below, the 

 cephalis is not represented.) 



Dimensions. — Length of the three joints, a 0-02, h 0-06, c 002 ; breadth, a 0-02, h 006, c 01. 



Habitat. — Fossil in Barbados. 



4. Clathrocyclas collaris, n. sp. (PI. 74, fig. 8). 



Shell subcorneal, with two indistinct strictures. Length of the three joints = 1:1:2, breadth = 

 1:2:3. Cephalis hemispherical, with a triangular prismatic horn three times the length. Thorax 

 truncate, conical, with a single transverse row of circular pores, each of which is placed in the lower 

 end of an oblong, lanceolate, longitudinal furrow ; collar composed of fifteen to twenty such furrows. 

 Abdomen inflated, with four to six transverse rows of circular pores, and with a coronal of nine 

 triangular, divergent feet, longer than the collar. 



Dimaisions. — Length of the three joints, a 0-02, h 0-03, c O'OG ; breadth, a 0-03, h 0-06, c O'OO. 



Habitat. — Central Pacific, Station 268, depth 2900 fathoms. 



5. Clathrocyclas puella, Haeckel. 



Podocijrfis imelJa sineiisis, Ehrenberg, 1875, Abhandl. d. k. Akad. d. "Wiss. Berlin, p. 82, 

 Taf. xiv. fig. 3. 



Shell subcorneal, with two indistinct strictures. Length of the three joints =1:1:2, breadth 



= 1:2:3. Cephalis hemispherical, with a pyramidal horn of twice the length. Pores subregular, 



circular, quincuncial, in the dilated abdomen (with four to five transverse rows), twice to three times 



as large as in the short thorax (with two to three rows). Coronal of the wide peristome with fifteen 



to twenty short, triangular, divergent feet, about as long as the cephalis. 



DimoisioTis. — Length of the three joints, a 0-02, b 0-02, c 0-04 ; breadth, a 0-02, b 0-04, c 0-06. 



Habitat. — Fossil in Barbados. 



6. Clathrocyclas domina, Haeckel. 



Podocyrtis domina sinensis, Ehrenberg, 1875, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 82, 

 Taf. xiv. fig. 4. 



Shell subcorneal, with two slight strictures. Length of the three joints =1:2:4, breadth = 

 1:3:4. Cephalis ovate, with a conical horn of the same length (and sometimes with some little 

 accessory thorns at its base). Pores subregular, circular, quincuncial, in the dilated abdomen (with 

 six to eight transverse rows), twice to four times as lai-ge as in the hemispherical thorax (with four 

 to six rows). Coronal of the wide persistome with nine to twelve short, triangular, divergent feet, 

 half as long as the cephalis (in Ehrenberg's figure incomplete). 



Dimensions. — Length of the three joints, a 0-02, b 0-04, c O'CS ; breadth, a 0-02, b 0-06, c 0-08. 



Habitat. — Central Pacific, Stations 263 to 268, depth 2650 to 3000 fathoms ; also fossil in 

 Barbados. 



