74 THE VOYAGE OF H.M.S. CHALLENGEPx. 



8. Carposphcera entactinia, Haeckel. 



Haliomma entactinia, Ehrenberg, 1875, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 74, Taf. xxvi. fig. 4. 



Cortical shell thick walled, rough, twice as broad as the medullary shell ; both shells with 

 regular circular pores, twice as broad as the bars. Six to eight pores on the quadrant. Outer pores 

 half as broad as the inner. Both shells connected by very numerous (twenty-four to forty-eight or 

 more) radial beams. 



Dimensions. Diameter of the outer shell 012, inner 0'06, outer pores O'OOS, bars 0'004, inner 

 pores 0-004. 



Habitat. Cosmopolitan ; Atlantic and Pacific, in various depths ; fossil in Barbados and Sicily. 



9. Carposphcera modesta, Haeckel. 



Haliomma modestum, Stohr, 1880, Palaeontogr. Bd. xxvi. p. 86, Taf. i. fig. 5. 



Cortical shell thick walled, rough, three times as broad as the medullary shell, with regular 

 circular pores of the same breadth as the bars. Eight to twelve pores on the quadrant. (Very 

 common, like the preceding species, and connected with it by numerous intermediate forms.) 



Dimensions. Diameter of the outer shell 012 to 0'2, inner 0'04 to O'OY, pores and 

 bars 0-006 to 0-008. 



Habitat. Atlantic and Pacific, from many Stations and at various depths ; fossil in Barbados 

 and Sicily. 



10. Carposphcera belladonna, n. sp. 



Cortical shell thick walled, smooth, five times as broad as the medullary shell, with regular 

 circular pores of the same breadth as the bars. Twenty to twenty-two pores on the quadrant. 

 Dimensions. Diameter of the outer shell 0'3, inner 0'06, outer pores and bars 0'004. 

 Habitat. North Atlantic, Faroe Channel, John Murray. 



11. Carposphcera areca, n. sp. 



Cortical shell very thick walled, rough, twice as broad as the medullary shell, with regular 

 circular pores half as broad as the bars. Eight to ten pores on the quadrant. 



Dimensions. Diameter of the outer shell 012, inner 0'06, outer pores 0'03, bars O'OOG. 

 Habitat.- Indian Ocean, Ceylon, Haecker, surface. 



Subgenus 3. Prunosphcera, Haeckel, 1881, Prodromus, p. 451. 



Definition. Pores of the cortical shell irregular polygonal, of unequal size or dis- 

 similar form. 



12. Carposphcera prunulum, n. sp. 



Cortical shell thin walled, smooth, four times as broad as the medullary shell, with large irregular 

 polygonal pores, four to eight times as broad as the bars. Connecting beams between them numerous. 



