REPORT ON THE RADIOLARIA. 1039 



(The size and number of the fork-branches is variable ; the horn is sometimes simple. In some 

 specimens a rudimentary remnant of the lost caudal foot is visible.) 



Dimensions. Shell 0'08 long, 0'09 broad; horn and feet 01 to 012 long. 



Habitat. Fossil in Barbados. 



2. Dendrospyris dirrhiza, Haeckel. 



Geratospyris dirrhiza, Ehrenberg, 1875, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 66, Taf. xx. 

 fig. 9. 



Shell nut-shaped, spiny, very similar to the preceding species. It differs from that mainly in 

 the growth of the cylindrical feet, which are not straight and divergent, but more or less curved 

 and convergent ; their distal ends are sometimes simply forked, sometimes repeatedly dichotomous. 

 The size and form of the apical horn are also very variable. 



Dimensions. Shell O'OG long, 0'08 broad ; horn and feet 0'07 to 0'09 long. 



Habitat. Fossil in Barbados. 



3. Dendrospyris bibrachiata, Haeckel. 



Cladospyris Mlracliiata, Ehrenberg, 1 875, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 68, Taf. xxi. 



fig. 7. 



Shell nut-shaped, smooth, with sharp stricture and numerous very small circular pores. Apical 

 horn and the two feet very large and stout, straight, prismatic, with irregular lateral branches on 

 their edges, twice to four times as long as the shell. (The horn in the Ehrenberg's figure is 

 broken off.) This species is closely allied to Tripospyris tribrachiata. 



Dimensions. Shell O05 long, 0'06 broad ; horn and feet O'l to 0'2 long. 



Habitat. Fossil in Barbados. 



4. Dendrospyris furcata, n. sp. 



Shell subspherical, tuberculate, with irregularly roundish pores. Basal plate with two large pores. 

 Apical horn simple, conical, as long as the shell. Feet cylindrical, twice as long, in the proximal 

 half parallel, vertical, in the distal half with two stout divergent equal fork-branches, one of which 

 is directed dorsally, the other ventrally. 



Dimensions. Shell O'OT long, 0'08 broad ; horn 0'06 long, feet 01 to 015 long. 



Habitat. Tropical Atlantic, Station 338, depth 1990 fathoms. 



5. Dendrospyris polyrrhiza, 11. sp. (PI. 85, fig. 8). 



Shell subspherical, rough, with subregular circular pores. Basal plate with three pores (?). 

 Apical horn simple, conical, half as long as the shell. Feet cylindrical twice to three times as long 

 as the shell, semicircular, with a strong conical tooth in the middle of their outer convex edge ; 

 their distal ends convergent, divided into a bunch of numerous short irregular branches. 



Dimensions. Shell 0'7 long, 0'08 broad ; horn 0'03 long, feet 015 to 0'25 long. 



Habitat. South Atlantic, Station 332, depth 2200 fathoms. 



