IIEPORT ON THE RADIOLARIA. 1355 



figured specimen broken off, iu another specimen, found afterwards, completely closed at the distal 

 end). Pores very small, regular, circular, of equal size. 



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



Habitat. — South Atlantic, Station 332, depth 2200 fathoms. 



2. Lithornithium falco, n. sp. (PI. 67, fig. 1). 



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

 1:4:3. Cephalis hemispherical, with a conical spine of the same length. Thorax subspherical, 

 with three conical wings of half the length, little curved, arising with broad triangular base from 

 the upper half of the thorax. Abdomen inversely conical. Pores irregular, roundish, of different 

 sizes. 



Dimensions. — Length of the three joints, a 0-02, b O'OG, c 0-07 ; breadth, a 0-03, b 0-08, c 0-06. 



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



3. Lithornithium trochilus, n. sp. (PL 67, fig. 4). 



Shell nearly spindle-shaped, with two deep strictures. Length of the three joints = 1 : 2 : 3_ 

 breadth = 1:3:2. Cephalis hemispherical, with a thin curved horn of the same length. Cephalis 

 subovate, with three thin curved wings of half the length, arising with broad base from its upper 

 half. Abdomen ovate. Pores subregular, circular, of sHghtly different sizes. 



DimensioTis. — Length of the three joints, a 0"015, b 0"5, c 0"06 ; breadth, a 0"02, b 0'05, c 0"04 



Habitat. — Central Pacific, Station 266, depth 2750 fathoms. 



4. Lithornithium foveolatum, Ehrenberg. 



Lithornithium foveolatum, Ehrenberg, 1875, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 78, Taf. 

 iv. fig. 7. 



Shell subovate, with two distinct strictures. Length of the three joints = 2:4:3, breadth = 

 3:5:4. Cephalis hemispherical, with a short conical spine of the same length. Thorax sub- 

 spherical, with three broad triangular wings of half the length arising from its lower half. Abdomen 

 subconical. Pores small, regular, circular, of nearly equal size. 



Dimensions. — Length of the three joints, a 0-02, b 0-04, c 0-03 ; breadth, a 0-03, b 0-05, c 0-04. 



Habitat. — Fossil in Barbados. 



5. Lithornithium fringilla, u. sp. (PI. 67, fig. 2). 



Shell ovate, with two slight strictures. Length of the three joints = 4:7:4, breadth = 3:7:5. 

 Cephalis ovate, with a pyramidal spine of the same length Thorax subconical, with three stout 



