REPORT ON THE RADIOLARIA. 1081 



strictures much larger. Basal plate with four large triangular pores. Apical horn slender, 

 prismatic ; its outer free part of the same length as the inner columella, and as the two lateral feet, 

 which are curved, shorter than half the ring. 



Ditnensiojis. — Shell 008 long, 0-09 broad; ring 0'06 long; horn and feet 0"03 long. 



Habitat. — Mediterranean, Messina (E. Hertwig). 



3. Lophospyris comosa, u. sp. 



Shell ovate, spiny, with deep transverse stricture. Cupola large, campanulate, nearly as long 

 and two-thirds as broad as the nut-shaped cephalis. Pores irregular, roundish, of little different size. 

 Basal plate with numerous (eight to twelve) similar pores. Apical horn large, nearly as long as the 

 shell, surrovmded by a bunch of smaller divergent spines. Two lateral feet divergent, larger than 

 the shell, cylindrical ; at the distal end irregularly branched, at the base surrounded by some smaller 

 spines. 



Dimensions. — Shell 015 long, O'll broad; ring 0'08 long; feet 0"2 long.' 



Habitat. — Western Tropical Pacific, Station 206, depth 2100 fathoms. 



Genus 471. Sepalospyris,^ Haeckel, 1881, Prodromus, p. 443. 



Definition. — T holospyrida with numerous basal feet (eight to twelve or 

 more). Galea with a horn. 



The genus Sepalospyris has been derived from the similar Petalospyris by 

 development of a galea or cupola on the coryphal face of the cephalis, or from 

 Tholospyris by multiplication of the basal feet. The latter (in the two observed 

 species from twelve to twenty -five) form a regular corona around the basal plate. 



1. SejMlospyris platyphylla, n. sp. 



Shell ovate, rough, with sharp transverse stricture. Cupola with dehcate network, hemi- 

 spherical, about two-thirds as long and broad as the nut-shaped thorax. Pores of the latter 

 irregular, roundish ; two or three pairs of large pores on each side of the sagittal stricture. 

 Apical horn conical, half as long as the shell. Basal coronet with twelve to fifteen broad, 

 lamellar, truncate, vertical feet, somewhat shorter than the cephalis. 



Dimensions. — Shell 012 long, 013 broad; ring 0'06 long; horn 0'04 ; feet 0-05 long. 



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



2. Sepalospyris iwlyphylla, n. sp. 



Shell campanulate, rough, with deep transverse stricture. Cupola hemispherical, about one- 

 third as long and broad as the nut-shaped thorax. Pores irregular, roundish, a little different in 



1 Sepalospyris = Basket with leaves ; ativcchor, »irt/j(V. 



(ZOOL. CHALL. EXP. — PART XL. — 1886.) Er 136 



