REPOKT ON THE RADIOLARIA. 785 



7. Amphilonchc dongata, Haeckel. 



Ainphilonche elongata, Haeckel, 1862, Monogr. d. Eadiol., p. 392, Taf. xviii. figs. 22«, 22^/. 

 Acantlwmetra elongnta, J. Miiller, 1858, Abhaudl. d. k. Akad. d. Wiss. Berlin, p. 48, Taf. vii. 

 fig. 13. 



Two principal spines quadrangular prismatic in the proximal half, cylindrical or spindle-shaped 

 in the distal half, with simple apex ; base a small pyramid, without leaf-cross. Eighteen smaller 

 spines very thin, bristle-shaped, conical on the base, with small jDyramid. Central capsule spindle- 

 shaped, transparent, yellow. 



Dimensions. — Length of the two major spines 0"o t(_) 0-5, breadth O'Ol to O03 ; length of the 

 eighteen smaller spines O'Oo to 0'3. 



Habitat. — Cosmopolitan ; Mediterranean, Atlantic, Indian, Pacific, surface. 



Subgenus 2. Amphilonchidium, Haeckel. 



Definition. — Spines at the central base with a broad leaf-cross, composed of four 

 prominent triangular lamellae ; between the meeting edges of the latter twenty-two 

 pyramidal compartments or basal funnels. 



8. Ampliilonche ovata, Haeckel. 



Amphilonche ovata, Haeckel, 1862, Monogr. d. Radiol., p. 390. 



Acanthometra ovata, J. MUller, 1858, AbhandL d. k. Akail. d. Wiss. Berlin, p. 17, Taf. vii. 

 fig. 10, Taf. ix. fig. 4. 



Two principal spines cylindrical, of equal breadth throughout their whole length, with simple 

 conical or bifid apex ; base with a large leaf-cross of double the breadth. Eighteen smaller spines of 

 the same form, but thinner and only half as long. Central capsule ellipsoidal, brown, opaque. 



Dimensions. — Length of the two major spines 0"3 to 0'4, breadth O^OOS to 0'012 ; length of tlie 

 eighteen minor spines 0"1 to 0'2. 



Habitat. — Cosmopolitiui ; Mediterranean, Atlantic, Pacific, surface. 



9. Amphilonche conica, n. sp. (PL 132, fig. 6). 



Two principal spines conical, elongate, with simple apex ; base . thickened, with large leaf-cross. 

 Eighteen smaller spines also conical, of about the same basal breadth, but only one-fourth to one- 

 half as long. Central capsule ellipsoidal, pellucid. 



Dimensions. — Length of the two major .spines 015 to 0'2, basal breadth O^OS to 0"04 ; length of 

 the eighteen minor spines 0'05 to O'l. 



Habitat. — Central Pacific, Stations 265 to 274, surface. 



(ZOOL. CHALL. EXP. — PART XL. — 1885>. lir 99 



