REPORT ON THE RADIOLARIA. 1039 



(The size and muiibcr of the huk-brauches is variable ; the horn is sometimes simple. In some 

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



Dimensions. — Shell O'OS long, 0-09 broad ; horn and feet O'l to 0-12 long. 



Habitat. — Fossil in Barbados. 



2. Dendrospyris dirrhiza, Haeckel. 



Ceratospyris dirrliiza, Ehrenberg, 1875, AbhancU. d. k. Akad. d. Wiss. Berlin, p. 6G, Taf. xx. 

 fig. 9. 



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

 the gi-owth 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 0-06 long, 0-08 broad ; horn and feet 0-07 to 0-09 long. 



Habitat. — Fossil in Barbados. 



3. Dendrospyris hihrachiata, Haeckel. 



Cladospyris hihrachiata, Ehrenberg, 1875, Abhandl. d. k. Akad. d. "Wiss. BerKc, 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 0'05 long, 0-06 broad ; horn and feet O'l to 0'2 long. 



Habitat. — Fossil in Barbados. 



4. Dendrospyris furcata, n. t<p. 



SheU 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 ecLual fork-branches, one of which 

 is directed dorsaUy, the other ventrally. 



Dimensions. — Shell O'OV long, 0-08 broad ; horn 0-06 long, feet Ol to 0-15 long. 



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



5. Dendrospyris polyrrhiza, n. sp. (PL 85, fig. 8). 



SheU 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. — SheU 07 long, 0'08 broad ; horn 0-03 long, feet 015 to 0'25 long. 



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



