REPORT ON THE RADIOLARIA. 1501 



Dimensions. Length of the shell (with six joints) 014 ; length of each joint (on an average) 

 0-02, breadth 0'07. 



Habitat. Central Pacific, Station 270, depth 2925 fathoms. 



Subgenus 2. Siphocampium, Haeckel, 1881, Prodromus, p. 437. 

 Definition. The joints of the shell are very different in length. 



5. Siphocampe quadrantalis, n. sp. 



Shell nearly spindle-shaped, with three deep strictures. Four joints of very different lengths. 

 Cephalis subspherical, with an oblique cylindrical tubule of twice the length, and with few small 

 pores. Thorax ovate, half as long as the shell, with twelve transverse rows of small pores. 

 Abdomen with two short joints, each of which has two transverse rows of pores. Mouth con- 

 stricted, one-third as broad as the thorax. 



Dimensions. Length of the shell (with four joints) 018 ; length of the thorax 01, breadth 

 0-08. 



Habitat. Western Tropical Pacific ; North Coast of New Guinea, Station 220, depth 1100 

 fathoms. 



6. Siphocampe spiralis, n. sp. (PI. 79, fig. 14). 



Shell nearly spindle-shaped, with eight slight strictures. Nine joints of very different lengths. 

 Cephalis subspherical, with an oblique cylindrical tubule of the same length, and numerous small 

 pores. Thorax conical, one-fourth as long as the shell, with eight transverse rows of small pores. 

 Abdomen with numerous prominent, spirally convoluted ribs, and spiral rows of pores between 

 them. The first abdominal joint is from two to three times as long as each of the six following joints. 

 Abdominal pores larger, roundish, disposed in eleven transverse rows. Four rows in the first 

 abdominal joint, one row in each of the five following, and two rows hi the last joint. Mouth 

 slightly constricted, two-thirds as broad as the shell. 



Dimensions. Length of the shell (with nine joints) 017, cephalis 0'02, thorax 0'04, abdomen 

 Oil ; breadth 0'06. 



Habitat. Western Tropical Pacific, Station 225, depth 4475 fathoms ; also fossil in Barbados. 



Genus 650. Lithocampe, 1 Ehrenberg, 1838, Monatsber. d. k. preuss. Akad. d. Wiss. 



Berlin, p. 128 (sensu emendato). 



Definition. S tichocorida (vel Stichocyrtida eradiata aperta) with ovate or 

 spindle-shaped shell, the mouth of which is constricted, but not prolonged into a tube. 

 Cephalis without horn and tube. 



1 Lithocampe = Stone-caterpillar ; *i'$o;, axft-rrn. 



