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



7. Cornutella clathrata, Ehrenberg. 



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



Mikrogeol., Taf. xxii. fig. 39. 

 Cornutella clathrata, Ehrenberg, 1875, Abhandl. d. k. Akad. d. Wiss. Berlin, Taf. ii. fig. 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 015 to 0'2 long, 0'06 to O09 broad. 



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

 Nikobar and Sicily. 



8. Cornutella stylophcena, Ehrenberg. 



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



Taf. vi. III. fig. 1. 



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

 %. 4. 



Shell slender, conical, with undulate outlines. Pores subregular, circular, gradually 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 013 long, 0'04 to 0'06 broad. 



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



9. Cornutella granulata, Ehrenberg. 



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

 III. fig. 5. 



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

 very small and numerous, punctiform, disposed into very numerous parallel transverse rows. 

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



Dimensions. Shell 0'08 long, 0'02 broad. 



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



10. Cornutella annulata, Ehrenberg. 



Cornutella annulata, Ehrenberg, 1872, Abhandl. d. k. Akad. 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 bristle-shaped. (Compare Artostrobus annulatus, Cornutella annulata, Bailey.) 



Dimensions. SheU 01 to 013 long, 0'03 to 0'04 broad. 



Habitat. Cosmopolitan, Atlantic, Pacific, surface. 



