REPORT ON THE RADIOLARIA. 1463 



the others, twice as long as the eleventh, and twice as broad as the ninth joint. The constricted mouth 

 on its lower surface is only one-third as broad. Cephalis small, hemispherical, with a short, conical 

 horn. Peristome with a coronal of twenty to thirty delicate, partly confluent, vertical teeth. 



Dimensions. Length of the shell (with thirteen joints) 0'26, breadth 012. 



Habitat. South-Eastern Pacific, Station 299 (off Valparaiso), depth 2160 fathoms. 



11. Cyrtophormis turricula, n. sp. (PL 75, fig. 5). 



Shell smooth, slender, tower-shaped, with fourteen distinct strictures. The ten first joints are 

 nearly equal in length. The twelfth joint is the largest, three to four times as long as each of the 

 preceding, and broader than all the others, twice as broad as the suddenly constricted mouth. Pores 

 small and numerous, regular, circular, quincuncial. Cephalis small, subspherical, with a pyramidal 

 horn of three times the length. Peristome with a coronal of twenty to thirty very delicate, partly 

 confluent, short, vertical teeth. 



Dimension^. Length of the shell (with fifteen joints) 0'3, breadth 01. Length of the twelfth 

 joint 0-05. 



Habitat. South-Eastern Pacific, Station 298 (off Valparaiso), depth 2225 fathoms. 



Subfamily 2. STICHOPH^NIDA, Haeckel, 1881, Prodromus, p. 439. 



Definition. P hormocampida with the terminal mouth of the shell fenestrated 

 (vel Stichocyrtida multiradiata clausa). 



Genus 640. Artophcena,' 1 - Haeckel, 1881, Prodromus, p. 438. 



Definition. Stichophaenida (vel Stichocyrtida multiradiata clausa) with six 

 radial ribs or wings. 



The genus Artophcena and the following genus Stichophcena represent together the 

 small subfamily of Stichophcenida, or of those Cyrtoidea in which the multiradiate 

 shell is composed of numerous (four or more) joints, and closed at the end by a lattice- 

 plate. The number of the lateral, solid, or latticed appendages is six in Artophcena, 

 nine in Stichophcena. They may have been derived either from the Stichophormida 

 by closure of the terminal mouth, or from the Stichoperida by intercalation of three 

 or six interradial appendages. 



1. Artophcena cerostatica, n. sp. (PL 75, fig. 4). 



Shell four-jointed, with three sharp strictures and internal septa. The fourth joint is sub- 

 spherical, longer than the three first joints together, and twice as broad as these. The second joint is 



1 Artopluena = Bread-shell; oSjrof, q>a.hct.. 



