REPORT ON THE RADIOLARIA. 1181 



3. Cornutella distenta, Ehrenberg. 



Cornutella distenta, Ehrenberg, 1872, Abhandl. d. k. Akad. d. Wise. Berlin, p. 287, Taf. vi. III. 



fig. 3. 



Shell slender, conical, with straight outlines. Pores small, circular, regularly disposed in six to 

 eight alternating longitudinal rows, each pore surrounded by a large rhombic frame. The connected 

 frames form together a regular rhombic framework with obliquely crossed crests. Horn conical, 

 stout, large. 



Dimensions. Shell 01 to 015 long, 0'04 to 0'06 broad. 



Habitat. North Pacific, Californian Sea, depth 2600 fathoms, Ehrenberg. 



4. Cornutella stiligera, Ehrenberg. 



Cornutella stUigera, Ehrenberg, 1854, Mikrogeol., Taf. xxxvi. fig. 1; Abhandl. d. k. Akad. d. 

 Wiss. Berlin, 1875, p. 68, Taf. ii. fig. 3. 



Shell slender, conical, with straight outlines. Pores subregular, rhombic or nearly square, dis- 

 posed in oblique series, separated by parallel obliquely ascending rings, which are crossed by 

 interrupted parallel bars. Horn slenderly conical or bristle-shaped, thin and long. 



Dimensions. Shell 0'08 to 012 long, 0'03 to 0'04 long. 



Habitat. Fossil in Barbados. 



Subgenus 2. Cornutissa, Haeckel, 1881, Prodromus, p. 427. 



Definition. Axis of the conical shell straight. Pores circular or roundish, without 

 polygonal frames. 



5. Cornutella circularis, Ehrenberg. 



Cornutella circularity, Ehrenberg, 1875, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 68, Taf. ii. fig. 4. 



Shell wide, conical or funnel-shaped, with straight outlines. Pores very large, circular, ten 

 to twenty times as broad as the bars, in about nine to twelve longitudinal alternating rows, increasing 

 gradually towards the mouth. Horn very large, cylindrical. 



Dimensions. Shell 01 to 015 long, 0'08 to 012 broad. 



Habitat. Fossil in Barbados. 



6. Cornutella mitra, Ehrenberg. 



Cornutella mitra, Ehreuberg,ll875, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 68, Taf. ii. fig. 8. 



Shell wide, conical, campanulate, with convex outlines. -Pores subregular, circular, nearly 

 equal in size, not regularly disposed in rows. Horn conical, stout. 

 Dimensions. Shell 012 to 016 long, 0'08 to 012 broad. 

 Habitat. Central Pacific, Station 268, depth 2900 fathoms ; also fossil in Barbados. 



