REPORT ON THE RADIOLARIA. 1753 



paired tergal styles, the former with ten to twelve, the latter with five to six alternate-cruciate pairs 

 of lateral branches. Terminal coronets (on the free distal ends of the styles) palmate, with ten to 

 twelve spinulate, irregular, finger-shaped branches (fig. Id). 



Dimensions. Length of the shell 5 "5, breadth 2'7. 



Habitat. South-Eastern Pacific (off Juan Fernandez), Station 297, depth 1775 fathoms. 



2. Ccelographis sagittella, n. sp. 



Shell-mantle one and a half times as long as broad, its frontal perimeter arrow-shaped, isosceles 

 triangular, with a deep concave excision at the base, its sagittal perimeter slenderly ovate. Nasal odd 

 style one and a half times as long as the paired tergal styles, the former with fourteen to sixteen, 

 the latter with eight to nine verticils of branches. Terminal coronets three times forked, with eight 

 subregular, broad and spinulate, finger-shaped branches. 



Dimensions. Length of the shell 6'4, breadth 4'2. 



Habitat. Central Pacific, Station 271, depth 2425 fathoms. 



3. Ccelographis hexastyla, n. sp. 



Shell-mantle one and a half times as long as broad, very similar to the preceding species, its 

 frontal perimeter isosceles triangular, with a flat basal excision. Nasal odd style one and a third 

 times as long as the paired tergal styles, the former with fourteen to sixteen, the latter with ten to 

 twelve verticils of branches. Terminal coronets with four forks in the form of a cross, and eight 

 divergent spinulate fingers. 



Dimensions. Length of the shell 4'2, breadth 3'1. 



Habitat. North Pacific, Station 259, depth 2225 fathoms. 



4. Ccelographis gracillima, Haeckel. 



Ccelodendrum gracillimurn (partim) Haeckel, 1862, Monogr. d. Radiol., Taf. xxxii. figs. 2, 3. 



Shell-mantle one and a third times as long as broad, similar to the three preceding species, 

 its frontal perimeter isosceles triangular. Nasal odd style one and a half times as long as the two 

 paired tergal styles, the former with eleven or twelve, the latter with seven or eight pairs of 

 branches. Terminal coronets irregularly dichotomously branched, with twelve to sixteen spinulate 

 fingers. The network of the mantle is also spinulate (loc. cit., fig. 3). This species was formerly 

 confounded by me with Ccelodendrum gracillimum (loc. cit., fig. 1), since I found a fragment only of 

 the former entangled in the branch-work of the latter (1859, in Messina). Afterwards (in 1877) 

 I observed a complete specimen in Corfu. 



Dimensions. Length of the shell 3'2, breadth 24. 



Habitat. Mediterranean (Messina, Corfu), surface. 



5. Ccelographis triangulum, n. sp. 



Shell-mantle about as long as broad, its frontal perimeter equilateral triangular, without basal 

 excision, with three equal straight sides. Nasal odd style and the two paired pectoral styles nearly 



(ZOOL. CHALL. EXP. PAET XL. 1886.) Rr 220 



