EEPOKT ON THE EADIOLARIA. 1175 



1. Phcenoscenium hexapodium, n. sp. (PL 98, fig. 9). 



Shell campanulate, smooth, about as long as broad. Network delicate, with irregular polygonal 

 pores and thin bars. Columella with four to six ascending three-branched verticils, prolonged 

 into the conical hollow apical horn (with six to eight smaller verticils) which is about as long 

 as the shell. Six basal feet curved, divergent, of the same length, with pinnate middle rod. 



Dimensions. Shell O'l long, O'll broad ; horn and feet 0'08 to 0'09 long. 



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



2. Phcenoscenium cladopodium, n. sp. 



Shell campanulate, conical, smooth, somewhat broader than long. Network with irregular 

 roundish pores, about as broad as the bars. Columella with a single verticil of three ascending 

 branches. Horn pyramidal, stout, as long as the shell, with three dentate edges. Six feet 

 divergent, slightly curved, very unequal ; three primary (or perradial) very large, longer than the 

 shell, three-sided pyramidal, with three dentate edges ; three secondary (or interradial) much 

 smaller, simple, shorter than the shell. 



Dimensions. Shell 0'05 long, 0'06 broad; horn and feet 0'04 to 0'07 long. 



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



3. Phcenoscenium polypodium, n. sp. 



Shell subspherical, about as long as broad, smooth. Network with regular circular pores, twice 

 as broad as the bars. Columella with two verticils of three ascending branches, prolonged into a 

 stout conical horn of twice the length. Twelve to fifteen conical curved divergent feet, about as 

 long as the shell. The three primary feet are directly connected with the base of the columella. 



Dimensions. Shell 0'08 diameter, horn 015 long, feet 0'07 to 0'09 long. 



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



Genus 524. Calpophcena, 1 Haeckel, 1881, Prodromus, p. 429. 



Definition. A rchiphsenida (vel Monocyrtida multiradiata clausa) with an 

 apical horn and simple internal cavity of the shell, without axial columella. 



The genus Calpophcena and the following closely allied Archiphcena differ from 

 the two preceding genera of Archiphsenida in the simple shell cavity, which encloses no 

 columella. They may be derived either from the preceding Phoenocalpis by loss of the 

 columella, or directly from the Zygospyrida by reduction of the sagittal constriction and 

 loss of the primary ring. Different subgenera may be distinguished in Calpophcena 

 according either to the number of the feet or to their shape (being simple or branched). 



1 Calpophrena=\Jiceo]a.te shell; 



