EEPORT ON THE RADIOLARIA. 1225 



broad as the constricted mouth, with regular, circular pores of the same breadth as the bars. Three 

 feet pyramidal, little divergent, straight, about as long as the cephalis. 



Bime^isions. — Cephalis O'Oo long, 0'03 broad ; thorax O'OO long, 0-08 broad. 



Habitat. — Central Pacific, Stations 263 to 268, depth 2650 to 2900 fathoms. 



2. Lychnocanium continuum, Ehrenberg. 



Lychnocanium continuum, Ehrenberg, 1875, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 78, Taf. vii. 

 fig. 11. 



Shell smooth, with distinct collar stricture. Length of the two joints = 1:3, breadth = 1:3. 

 Cephalis subspherical with a conical horn of the same length. Thorax pear-shaped, twice as broad 

 as the constricted mouth, nearly hyaUne, with a very small number of scattered mumte pores. 

 Three feet pyramidal, little divergent, straight, about as long as the thorax. 



Diviensions. — Cephalis 0'02 long, 0'02 broad ; thorax 0'06 long, 0'06 broad. 



Habitat. — Fossil in Barbados. 



3. Lychnocanium pyriforme, n. sp. (PL 61, fig. 11). 



Shell pear-shaped, rough, with sharp coUar stricture. Length of the two joints =1:4, breadth 

 = 1:5. Cephalis hemispherical, with a conical horn of the same length. Thorax inflated, four 

 times as broad as the constricted tubular mouth, with regular, circular pores. Three feet pyramidal, 

 straight, divergent, about as long as the thorax. 



Dimensions. — Cephalis 0'02 long, 0'03 broad ; thorax 012 long, 015 broad. 



Habitat. — Cosmopolitan ; Atlantic, Indian, Pacific, many Stations ; also fossil in Barbados. 



4. Lychnocanium favosum, u. sp. (PL 61, fig. 6). 



Shell campanulate, rough, with slight collar stricture. Length of the two joints = 1:5, breadth 

 = 1:6. Ceplialis hemispherical, with a rudimentary pyramidal horn of half the length. Tliorax 

 subglobular, three times as broad as the constricted mouth, with regular, circular pores, and an 

 elevated hexagonal framework between them. Three feet cylindrical, slender, straight, divergent, 

 twice to three times as long as the thorax. 



Dimensions. — Cephalis 0'02 long, 0"025 broad ; thorax 01 long, 012 broad. 



Habitat. — Central Pacific, Station 266, depth 2750 fathoms. 



5. Lychnocanium nodosum, n. sp. (PL 61, fig. 14). 



Shell campanulate, nodose, with deep collar stricture. Length of the two joints =1:3, breadtli 

 = 1:4. Cephalis subglobular, with a rudmientary conical horn of half the length. Thorax 

 nearly hemispherical, twice as broad as the fiat mouth, witli regular, circular pores, and a variable 



(ZOOL. CHALL. EXP. — PART XL. — 1886.) Rr 154 



