REPORT ON THE RADTOLARIA. 871 



9. Phatnaspis quadvatura, n. s]?. 



Parmal pores regular, square, all of nearly equal size and form, ten to twelve on each side of 

 the primary diagonal rib, which arises from both edges of the compressed spines ; two primary 

 aspinal pores opposite on the two flat sides of the latter, not different from the other pores. Spines 

 sword-like, their outer part about as long as the inner. 



DimcTisions. — Length of the shell 0'2, breadth 016 ; basal breadth of the spines 0-004. 



Habitat. — Central Pacific, Station 274, surface. 



10. Phatnaspis tahulata, Haeckel. 



Haliumma iahulutum, J. Miiller, 1858, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 37, Taf. v. 



figs. 5-8. 

 Haliomma taliilatum, Haeckel, 1862, Monogr. d. EadioL, p. 429. 



Parmal pores regular, circular, with square frames, all of nearly equal size, eight to ten on each 

 side of the primary diagonal rib, which arises from both edges of the compressed spines ; two primary 

 aspinal pores ojiposite on the flat sides of the latter. Spines sword-like, .short, scarcely half as 

 long as the radius of the shell, their central ends are thickened and cause by their union the 

 deceptive appearance of an enclosed " medullary shell." 



Dimensions. — Length of the shell 012 to 015, breadth 01 to 012 ; breadth of the spines 0'006. 



Habitat. — Mediterranean ; Nice, Miiller ; Portofino, near Genoa, Haeckel, surface. 



Subgenus 3. Phatnaspidium, HaeckeL 



Definition. — In the centre of each rhomboidal plate four primary aspinal spines, 

 forming a regular cross, the centre of which receives the cylindrical or four-sided 

 prismatic spine. 



11. Phatnaspis haliommidium, n. sp. (PL 136, fig. 7). 



Parmal pores irregular quadrangular, of unequal size and form, eight to ten on each side of the 

 crossed diagonal ribs, which arise at right angles from the four edges of the prismatic spines ; 

 four primary aspinal pores not different from the others. Outer part of the strong spines scarcely 

 longer than the inner. (Eesenibling Icosaspis tahulata, PI. 136, fig. 2. which, however, is distin- 

 guished by the spherical sheU and the larger pores.) 



Dimensions. — Length of the shell 0-22, breadth 017 ; breadth of the .spines 0'016. 



Habitat. — North Pacific, Station 244, surface. 



12. Phatnaspis millleri, n. sp.. 



naliommatklimn miiUeri, Haeckel, 1862, Monogr. d. Radiol., p. 419, pi. xxii. figs. 10-12. 



Parmal pores regular, square, all of nearly equal size and form, twelve to sixteen on each side 

 of the crossed diagonal ribs, which arise at right angles from the needle-shaped spines; the four 



