26 THE VOYAGE OF H.M.S. CHALLENGER. 



Dimensions. — Length of the central capsules 0-2 to O'o, breadth of them Ol to 15. 

 Habitat. — North Pacific, Station 244, surface. 



5. CoUozoum ellipsoides, n. ay. (PI. 3, figs. 8, 9). 

 Colloprunum ellipsoides, Haeckel, 1882, Manuscript. 



Central capsules regularly ellipsoidal, very large; tbeu- longer diameter once and a half to twice 

 as large as the shorter. In every capsule fifty to eighty oil-globules. 



Dimensions. — Length of the central capsules O'.S to 4, breadth of them 0"2. 

 Habitat. — North Atlantic, Fseroe Channel (Gulf Stream), surface, John Murray. 



Subgenus 3. Collopliidium; Haeckel. 



Definition. — Form of the central capsules cylindrical, often snake-like, contorted, 

 with one axis much prolonged, several times longer than the transverse axis. 



6. CoUozoum contorlum, n. sp. 



CollopMdium eontortuin, Haeckel, 1882, Manuscript. 



Central capsules cylindrical, three to four times as long as broad, C- or S-like curved, transparent, 

 without oil-globules. 



Dimensions. — Length of the central capsules 0-2 to 0'3, breadth 0'06 to 0'08. 

 Habitat. — Tropical Atlantic, Station 347, surface. 



7. CoUozoum serpentinum, n. sp. (PI. 3, figs. 1-3). 



CollopMdium serpentinum, Haeckel, 1882, Manuscript. 



Central capsules cylindrical, filiform, much elongated, ten to one hvmdred times, sometimes two 

 hundred to four hundred times as long as broad, snake-shaped or worm-shaped, curved and contorted 

 in the most irregular manner, often spiral or twisted into a large nodule. Numerous oil-vesicles 

 constantly present, forming one series of globules in the axis of every capsule ; distance of the 

 globules, one from another, and also from the capsule-membrane, about equal to their diameter. (This 

 interesting and very curious form was very frequently observed living by me in the Canary Islands, 

 in January 1867 ; tlie jelly-colonies were commonly spherical, and contained fifty to two hundred 

 or more capsules of very different size and form.) 



Dimensions. — Length of the central capsules 1 to 10, sometimes 20 to 40 mm.; average breadth 

 O'l mm. 



Habitat. — Canary Islands, Lanzerote, Haeckel, surface. 



