REPORT ON THE RADIOLARIA. 1447 



prolonged over the wide mouth into three divergent, conical feet, half as long as the shell. Cephalis 

 hemispherical, with a conical, slender, curved horn, three times the length. Tores subrernxlar 

 hexagonal. 



Dimensions. — Length of the shell (with eight joints) OIG, of each single joint (on an average) 

 0-02; basal breadth O-OV. 



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



Genus 632. Stichojiodium,^ Haeckel, 1881, Prodromus, p. 439. 



Definition. — S t i c h o p i 1 i d a (vel Stichocyrtida triradiata aperta) without lateral 

 ribs or wings, but with three free latticed terminal feet. Cephalis with a horn. 



The genus Stichopodium differs from the preceding genus Podocampe in the fenes- 

 tration of the three free terminal feet. It agrees in this character with the genus 

 Stichopterium, and may be derived either from this by loss of the lateral ribs, or 

 from the three-jointed Pterocanium by addition of new shell -joints. 



1. Stichopodixun dictyop)odium, n. sp. (PL 75, fig. 6). 



Shell subcylindrical, in the upper third conical, with six or seven internal annular septa. All 

 seven or eight joints are about equal in length, except the small hemispherical cephalis, which is 

 scarcely half as long, and bears an oblique, conical horn of the same length. Pores small and 

 numerous, regular, circular, quincuncial. The last joint with wide open mouth, and a peristome of 

 three large, triangular, latticed, shovel-shaped, vertical feet. 



Dimensions. — Length of the shell (with seven joints) 0'2, breadth OIL Length of each single 

 joint about 0-03, of the feet 0-03. 



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



Subfamily 2. Stichoperida, Haeckel, Prodromus, p. 439. 



Definition.- — P odocampida with the terminal mouth of the shell fenestrated 

 (vel Stichocyrtida triradiata clausa). 



Genus 633. Stichopera,^ Haeckel, 1881, Prodromus, p. 439. 



Definition. — S tichoperida (vel Stichocyrtida triradiata clausa) with three 

 solid lateral ribs, or three longitudinal combs of spines. Cephalis with a horn. 



'^ Stichopodium = B,ow-ioot; BTijcos, voi ion. ■ SJic^opera = Row-pouch ; arixo;, ■TrijQot. 



