REPORT ON THE EADIOI-ARIA. 27 



8. CoUozoum vermiforme, n. sp. (PL 3, figs. 6, 7). 



Collophidiurii vermiforme, Haeckel, 1882, Manuscript. 



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

 as long as broad, snake-sliaped or worm-shaped, very irregularly curved and contorted. Numerou.s 

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

 rose-coloured globules. (This sj)ecies is nearly allied to the jjreceding ; 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 1'2 mm., sometimes 3 to 6 mm. ; breadtli 

 0-12. 



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



Subgenus 4. CoUodiscus, Haeckel. 



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

 axis. 



9. CoUozoum coe7'uleum, Haeckel. 



Collozoum coeruteiim, Haeckel, 1862, Monogr. d. Eadiol., p. 523, Taf. xxxii. figs. 6-8. 

 CoUodiscus cocrideus, Haeckel, 1882, Manuscript. 



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

 in the centre. Protoplasm containmg 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 0-1 to 015, height 0'04 to 0'08. 



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



10. Collozoum discoideum, n. sp. 



CoUodiscus 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. — South 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. 



