REPORT ON THE RADIOLARIA. 345 



7. Spongurux radians, n. .sp. 



Shell ellipsoidal, one and a half times as long as broad, with thorny surface, and eighty to one 

 hundred and twenty (or more) tlun, bristle-shaped, radial spines, somewhat longer than the shell. 

 Spongy framework in the inner part very compact, in the outer part very loose, with a gradual 

 transition between the two parts. Meshes in the central part not broader than the bars, in the 

 superficial part ten to twenty times as broad. 



Dimensio)is. — Length of the shell 0"24, breadth 0"16. 



Habitat. — Mediterranean, I'ortofino, near Genoa, Haeckel, surface. 



8. Spongurus spongechinits, n. sp. 



Shell ellipsoidal, one and a tliiiil times as long as liroad, with thorny surface, and thirty to forty 

 tliick, conical radial spines, about half as long as the shell. Spongy framework in the inner part 

 of the shell compact, in the outer loose, with a gradual transition between the two parts. Meshes 

 in the central part smaller than the bars, in the superficial part four to eight times as broad. 



Dimensions. — Length of the shell 0"18, breadth 0"14. 



Habitat. — North Atlantic, Station 353, surface. 



(ieuus 14G. Spoxgocore,^ u. gen. 



Definition. — 8p u ugii r i da with ellipsoidal or cyliudrical (sometimes three- 

 joiuted) shell of solid spongy framew^ork, without internal cavity and without latticed 

 medullary shell. Polar spines absent. An outer lattice-mantle is connected with the 

 spongy shell liy radial beams. 



The genus Spongocore contains some widely distributed Spongurida, which are 

 distinguished from the nearly related Sponguni.'i by the development of a peculiar veil 

 or mantle of delicate lattice-work, which envelops either the whole shell or only the 

 middle part of it, and is connected with it by numerous radial beams. The distance of 

 the simple fine lattice -lamella from the spongy shell is everywhere the same. Often 

 the cylindrical shell is three-jointed, with two annular strictures, as also in the foregoing 

 Sp)Ongurus. It is derived from the latter by development of the veil connecting the 

 points of the radial .spines. 



Subgenus L Spongocorina, Haeckel. 

 Definition. — Shell without distinct annular strictures, not evidently three-jointed. 



' /S[/)OM30core = Spongy puppet ; uToyya;, xiijij. 

 (znOL. CHALL. EXP. — PART XL. — 1885.) Er 44 



