REPORT ON THE RADIOLARIA. 1087 



1. Phormospyris tricostata, n. sp. (PL 83, fig. 15). 



Cephalis nut-shaped, thorny, with deep sagittal and collar strictures, half as large as the 

 pyramidal thorax. Mouth of the latter dilated and ciliated, twice as hroad as the cephalis. Pores 

 irregular, polygonal, with thin bars. Three cylindrical, straight, divergent ribs descend in the wall 

 of the thorax, and are prolonged over the mouth into three short conical teeth. 



Dimensions. Cephalis 0'06 long, 0'09 broad; thorax 0'08 long, 016 broad. 



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



2. Phormospyris tridentata, n. sp. (PI. 95, fig. 18). 



Cephalis nut-shaped, with deep sagittal and collar strictures, about twice as large as the thorax. 

 Mouth of the latter half as broad as the cephalis. Pores very small and numerous, subregular, 

 circular. Collar plate with four large triangular pores. In the wall of the thorax three vertical 

 prismatic ribs descend, which are prolonged over the mouth into three parallel feet of the same length. 



Dimensions. Cephalis 0'06 long, 0'08 broad ; thorax 0'04 long, 0'06 broad. 



Habitat. Central Pacific, Station 274, depth 2750 fathoms. 



3. Phormospyris trifoliata, n. sp. 



Cephalis nut-shaped, with deep sagittal and collar strictures, smaller than the thorax. Mouth 

 of the latter nearly as broad as the cephalis. Pores circular, double-contoured, larger in the thorax 

 than in the cephalis. The thorax has no lateral ribs, but bears around the mouth three large 

 triangular lamellar terminal feet. 



Dimensions. Cephalis 0'04 long, - 05 broad ; thorax 0'06 long, 0'05 broad. 



Habitat. Central Pacific, Station 271, depth 2425 fathoms. 



Subfamily 2. KHODOSPYRIDA, Haeckel. 



Definition. P hormospyrida with a corona of numerous (nine to twelve or 

 more) basal feet. 



Genus 476. Patagospyris, 1 Haeckel, 1881, Prodromus, p. 443. 



Definition. P hormospyrida with numerous basal feet (nine to twelve or more) 

 and an apical horn. 



The genus Patagospyris and the two following closely allied genera differ from the 

 two preceding tripodal genera in the multiplication of the basal feet, and therefore 

 have to the latter the same relation that the Polyspyrida (Petalospyris) bear to the 

 Tripospyrida (Tripoerpyris). When the numerous basal feet of Petalospyris become 

 connected by lattice-work, Patagospyris arises. 



1 Patagospyris = Basket with a patagium ; Ki 



