REPORT ON THE RADIOLARIA. 1125 



3. Phormobotrys hexathalamia, Haeckel. 



Botryocarnpe hexathalamia, Haeckel, 1862, Monogr. d. Radiol., p. 344, Taf. xii. fig. 10. 



Cephalis sexlobate, with a single apical horn, which is solid, vertical, cylindrical, pointed, only 

 one-third as long. Frontal lobes subcylindrical, nearly as long as the kidney-shaped occipital lobe, 

 three to four times as long as the small buccal lobes and the odd sternal lobe. Thorax tun-shaped, 

 smaller than the cephalis, larger than the hemispherical abdomen. Pores numerous, subregular, 

 circular. 



Dimensions. Length of the shell 013 to 015, breadth 0'05 to 0'06. 



Habitat. Mediterranean, Messina, surface. 



4. Phormobotrys cannothalamia, n. sp. (PI. 96, fig. 25). 



Cephalis trilobate, of about the same breadth and length as the campanulate thorax, which is 

 three times as long as the flat cap-shaped abdomen. The middle (or central) lobe of the cephalis is 

 simple, nearly cubical, and smaller than the ovate occipital and frontal lobe. The two latter are 

 prolonged into two slender cylindrical divergent tubes. Pores small and very numerous. 



Dimensions. Length of the shell 01, breadth - 05. 



Habitat. Western Tropical Pacific, Station 225, depth 4475 fathoms. 



5. Phormobotrys polythalamia, n. sp. 



Cephalis multilobate, of the same length and breadth as the subspherical thorax, and half as 

 long as the ovate abdomen. Occipital lobe helmet-shaped, about as large as the frontal half of the 

 cephalis, which is divided into six to eight lobes (two odd and two or three pairs of lateral lobes). 

 Four cylindrical tubes corresponding to the four typical spines of Cortina, an ascending apical and three 

 descending basal tubes (a posterior caudal and two anterior pectoral). 



Dimensions. Length of the shell 014, breadth 0'08. 



Habitat. South Pacific, Station 298, depth 2225 fathoms. 



