1 8 Frot . 
PROTOZOA. 
then striated longitudinally ; after its fis«ion, the stiiation disappears ; 
then, but before the two tests separate, the protoplasm of the two 
becomes mixed by a circulating movement; the independence of the 
nucleus and body during fission appears to support the theory of their 
diverse character. 
Lieberkuehnia wageneri of Siddall, according to Carpenter, The Micro- 
scope and its Revelations, Ed. vi. p. 473, note, is probably not Clapa- 
rMe & Lachmann’s species. 
Quadrula symmetrica, (23) p. 106. 
Trinema acinus, (23) p. 108, pi. iv. fig. 3. Skeleton plates sometimes 
found detached within the shell. 
Amceha actinophora, Auerbach, (25) p. 464, pi. xxx. figs. 9-17. A thin 
dermal layer of sarcode commonly invests the body, but is not per- 
manently distinct from the rest of the sarcode. 
New Genera and Species. 
Radiolaria. 
E. Haeckel (SB. nat. Er. 1881, p. 67) adds to what he has already 
stated with regard to ihQ Radiolaria collected during the ‘Challenger’ 
Expedition, that the greater part of the 2000 now species belong to the 
Cystoidea and Sjduuroidea. 
The following 483 new genera are diagnosed, together with previously 
known forms, by Haeckel (26) dichutoraously, with various minor named 
sub-divisions : — 
Class RADIOLARIA. 
Order I. MONOPYLARIA. 
Earn. Plectida: Triplagia, Plagonium {p. A2^), Tetraplagia, Plagio- 
carpa, Plagonidium, Hexaplagia, Hexaplagldium, Enneaplagia, Enne- 
plagidium, Triplecta, Plectanium, PlectopJiora, Tefraplecta, Amphiplecta, 
Periplecta (p. 424), Pentaplegma, Hexaplegma, Enneaplegma, Plegmatium 
(p. 425). 
Earn. Cyrtida : Cornutissa, Mitrocalpis, Archicorys, Archilophus, Gor- 
nutanna, Cornutosa, Cornutura, Acrocalpis, Echinocalpis^ Cladocalpis^ 
Archipilium, Pteropilium, Trissopilium, Tripleurium (p. 427), Triptero- 
calpis, T'ripocalpis, Tripodtscus, Tripodiscium^Triprionium, Tripilidium, 
Tripodocorys, Tridictyopus, Bathropyramis, Cinclopyramis, Acropyramis, 
Cladopyramis, Peripyramis, Archiphormis, Archicapsa (p. 428), Halicapsa, 
EcJiinocapsa, Archihursa, Platy bursa, Clathrohursa, Archipera, Archi- 
peridium, Pteruperidium, Archiscenium, Cladosceniuin, Pteroscenium^ ArcM- 
phatna, Cladophatna, Coronophatna, Stephanophatna, Tetrarliabda, Tetra- 
corethra, Tetrapteroma (p. 429), Acrocorona, Cladocorona, Cryptocephalus 
[!], Platy cry pliahis, Sethocorys, Cornutellium, Conarachnium,) Phlebarach- 
nmrn, Cladarachnium, Periarachnium, Sethodiscus, Dictyoprora, Platy- 
sestrum (p. 430), Anthocyrtidium, Eucyrtumphalus, Lamprodisculus, 
Psilomelissa, Sethomelissa, Callimitra, Sethopilium, Clathrolychnus, Lam- 
2 )romitra, Glathrocorona (p. 431), Lamprotripus, Lychnodictyum, Clathro- 
mitra, Clathrocorys, Tetraphormis, Pentaphormis, Hexaphormis, Ennea- 
phormis, Cephalopyramis,Plectopyramis,Acanthocorys, Sethopyrarnis (p. 432), 
