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



12. Cenosphcera setosa, Ehrenberg. 



Genosphcera setosa, Ehrenberg, 1872, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 287, Taf. viL fig. 1. 

 Shell thin walled, covered with very short and numerous bristles. Pores regular, circular, five to 

 six times as broad as the bars, six to eight on the quadrant. 



Dimensions. Diameter of the shell 017, pores 0'2, bars 0'03. 



Habitat. West Tropical Pacific, 3300 fathoms; Philippine Sea, Station 200, depth 250 fathoms. 



13. Cenosphcera plutonis, Ehrenberg. 



Cenosphcera plutonis, Ehrenberg, 1854, Mikrogeol., Taf. xxxv. B, B. iv. fig. 20. 



Shell thin walled, covered with short conical papillae. Pores regular, circular, twice as broad as 

 the bars, eight to nine on the quadrant. 



Dimensions. Diameter of the shell 0'09, pores 0'006, bars 0'003. 

 Habitat. North Atlantic, Station 353, depth 2965 fathoms. 



14. Cenosphcera proserpince, n. sp. 



Shell thin walled, smooth. Pores regular, circular, four times as broad as the bars, five to six on 



the quadrant. 



Dimensions. Diameter of the shell 0'08, pores O'OOS, bars 0"002. 

 Habitat. Central Pacific, Station 265, depth 2900 fathoms. 



15. Cenosphcera eridani, n. sp. 



Shell thin walled, smooth. Pores regular, circular, three times as broad as the bars, eleven to 

 twelve on the quadrant. 



Dimensions. Diameter of the shell 0'16, pores O'Ol, bars 0'003. 

 Habitat. South Pacific, Station 295, depth 1500 fathoms. 



16. Cenosphcera lethe, n. sp. 



Shell thick walled, smooth. Pores regular, circular, double-edged, five times as broad as the bars, 

 sixteen to eighteen on the quadrant. 



Dimensions. Diameter of the shell 0'25, pores O'Ol, bars 0'002. 

 Habitat. North Atlantic, Station 64, depth 2700 fathoms. 



17. Cenosphcera elysia, n. sp. (PI. 12, fig. 8). 



Shell thick walled, rough. Pores regular, circular, double-edged, twice as broad as the bars, twelve 

 tn fourteen on the quadrant. 



Dimensions. Diameter of the shell 0'2, pores O'Ol, bars 0'005. 

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



