REPORT ON THE RADIOLARIA. 1099 



1. Periapyrie bicincta, n. sp. (PL 88, fig. 13). 



Shell smooth, with two deep transverse annular strictures and a deep sagittal incision at the 

 sternal base ; one and a half times as long as broad. Cephalis nut-shaped, with large irregular 

 roundish pores and very broad bars. Everywhere from its surface there arise numerous slender 

 arborescent radial beams; by the anastomoses of their ramified branches there arise the flat cap- 

 shaped cupola and the larger bilobed thorax ; and also the external enveloping shell with loose 

 delicate network. 



Dimensions. Inner shell 017 long, O'l broad ; outer shell 0'23 long, 017 broad ; ring 0'06 long. 



Habitat. Western Tropical Pacific, Station 225, depth 4475 fathoms. 



2. Perispyris spongiosa, n. sp. 



Shell rough, with two distinct transverse strictures and a deep sternal incision, similar to the 

 preceding ; the radial beams arising from the inner shell, and forming by anastomosing branches 

 the outer shell, are thinner and more numerous, and the framework of the latter on the surface is 

 very dense and spongy, therefore the shell is dark and not transparent. 



Dimensions. Inner shell 018 long, 012 broad ; outer shell 0'241ong, 018 broad ; ring 0'08 long. 



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



3. Perispyris lentellipsis, n. sp. (PI 88, fig. 12). 



Shell smooth, lentelliptical, with three different isopolar axes, perpendicular one to another. 

 Transverse and sagittal strictures are wanting ; but the large enclosed ring and the two pairs of 

 large adjacent annular meshes indicate clearly the position and size of the hidden cephalis. The 

 two other joints (the cupola on the upper and the thorax on the lower pole of the cephalis) are 

 nearly equal, cap-shaped or hemispherical. The outer lentelliptical shell is little larger than the 

 inner, connected with it by numerous thin bristle-shaped radial beams, and exhibits a delicate 

 arachnoidal lattice-work. 



Dimensions. Inner shell 015 long, 01 broad; outer shell 018 long, 013 broad; ring 0'08 long. 



Habitat. Central Pacific, Station 272, depth 2600 fathoms. 



Subfamily 3. NEPHKOSPYRIDA (vel PARADICTYIDA, Haeckel, 1881). 



Definition. Androspyrida without free basal feet and external constrictions. 

 Shell either spherical or discoidal. 



Genus 484. Sphcerospyris, 1 n. gen. 



Definition. Androspyrida with a spherical or subspherical shell, without 

 basal incision and transverse constriction ; without free basal feet. 



1 Sphcerospyris = Spherical wicker-baaket ; 



