1182 THE VOYAGE OF H.M.S. CHALLENGER. 



7. Cornutella clathrata, Elireuberg. 



Cornutella dathrata, Ehrenberg, 1838, Monatsber. d. k. preuss. Akad. d. Wiss. Berlin, p. 129; 



Mikrogeol., Taf. xxii. fig. 39. 

 Cornutella clathrata, Ehrenberg, 1875, Abhandl. d. k. AkaJ. d. AViss. Berlin, Taf. ii. tig. 9. 



Shell wide, conical, with slightly convex outlines. Pores regular, circular, gradually increasing 

 in size towards the mouth, disposed in twelve to fifteen longitudinal alternating rows. Horn short 

 and stout, conical. (Compare Cornutella curvata.) 



Dimensions. — Shell 0-15 to 0-2 long, 0-06 to 0-09 broad. 



HaMtat. — Cosmopolitan ; Atlantic, Indian, Pacific ; also fossil in tertiary rocks of Barbados, 

 Nikobar and Sicily. 



8. Cornutella stylophcena, Elireuberg. 



Cornutella stijlophmna, Ehrenberg, 1872, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 287, 

 Taf. vi. III. fig. 1. 

 ? Cornutella tumens, Ehrenberg, 1872, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 287, Taf. vi. III. 

 fig. 4. 



SheU slender, conical, with undulate outlines. Pores subregular, circular, gi-adually increasing 

 in size, disposed in six to nine quincuncial alternating longitudinal rows. Horn very long, cylindro- 

 conical, sometimes about as long as the shell. 



Dimensions. — Shell 01 to OlS long, 0-04 to 0-06 broad. 



Habitat. — North Pacific, Calif ornian Sea, depth 2600 fathoms. 



9. Cornutella gramtlata, Ehrenberg. 



Cornutella gramtlata, Ehrenberg, 1872, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 287, Taf. vi. 

 Ill fig. 5. 



Shell slender, conical, nearly cylindrical, with straight outlines, rounded at the apex. Pores 

 very small and numerous, punctiform, disposed into very numerous pai'allel transverse rows. 

 Horn small, conical (may be perhaps the shell of a Tintinnoid Infusorium ?). 



Dimensions. — Shell O'OS long, 0-02 broad. 



Habitat. — North Pacific, Californian Sea, deptli 2600 fathoms. 



10. Cornutella annulata, Ehrenbero-. 



Cornutella annulata, Ehrenberg, 1872, Abhandl. d. k. .Vkad. d. Wiss. Berlin, p. 287, Taf. ii. 

 fig. 16. 



Shell slender, conical, nearly cylindrical, with straight outlines, rounded at the apex. Pores small 

 and numerous, regular circular, of equal size, regularly disposed in ten to fifteen parallel trans- 

 verse series. Horn l)ristle-shaped. (Compare Artostrobus annulatus, Cornutella amiulata, Bailey.) 



Dimensions. — Shell 01 to 013 long, 0'03 to 0-04 broad. 



Habitat. — Cosmopolitan, Atlantic, Pacific, surface. 



