REPORT ON THE RADIOLARIA. 27 



8. Collozoum vermiforme, n. sp. (PI. 3, figs. 6, 7). 



Collophidium vermiforme, Haeckel, 1882, Manuscript. 



Central capsules cylindrical, much elongated, five to ten times (sometimes twenty to fifty times) 

 as long as broad, snake-shaped or worm-shaped, very irregularly curved and contorted. Numerous 

 oil-globules constantly present, forming in the axis of every capsule a double series of alternating 

 rose-coloured globules. (This species is nearly allied to the preceding ; but its capsules are thicker 

 and shorter, and the oil-vesicles in them are arranged not in a single, but in a double row.) 



Dimensions. Length of the central capsules 0'6 to T2 mm., sometimes 3 to 6 mm. ; breadth 

 012. 



Habitat. Tropical Atlantic, near the west coast of Africa, Station 349, Canary Islands, surface. 



Subgenus 4. Collodiscus, Haeckel. . 



Definition. Form of the central capsules discoidal or lenticular, with one shortened 

 axis. 



9. Collozoum coeruleum, Haeckel. 



Collozoum coeruleum, Haeckel, 1862, Monogr. d. Radio!., p. 523, Taf. xxxii. figs. 6-8. 

 Collodiscus coerulem, Haeckel, 1882, Manuscript. 



Central capsule lenticular or discoidal, flattened, blue coloured, with one single oil-globule 

 in the centre. Protoplasm containing numerous crystals and dark blue pigment-granules. 

 Membrane very thick, double-edged. (Whilst at Messina in 1859 I found this form not constantly 

 discoidal, in 1867 in the Canary Islands I observed it constantly lenticular.) 



Dimensions. Breadth of the central capsules 01 to 015, height 0'04 to 0'08. 



Habitat. Mediterranean (Messina), Atlantic (Canary Islands), surface. 



10. Collozoum discoideum, n. sp. 



Collodiscus discoideus, Haeckel, 1882, Manuscript. 



Central capsule discoidal, flattened, transparent, with a ring of twenty to twenty-five oil-globules 

 in its circular periphery (on the inside of the thin membrane). 

 Dimensions. Breadth of the central capsules 0'2, height 0'05. 

 Habitat. ^Sonth Pacific (Juan Fernandez), Station 300, surface. 



Subgenus 5. Collodastrum, Haeckel. 



Definition. Form of the central capsules irregular and indefinite, variable, 

 commonly polyhedral or polygonal, or amoeboid, often with irregular, finger-like 

 processes. 



