RHiZOrODA. MONADS, FLAGELLATA. 
JProt. t 
Plagiophrys scutiformis, H. & L., (1 a) p. 123, pi. viii. fig. 11. 
Plagio’phrys sacciformis^ H. & L., (1 a) p. 122, pi. viii. fig. 11. 
Microgromia socialis, Ar. (1 a), p. 116, pi. viii. fig. 8. Flagellated 
zoospores are budded from the protoplasm ; it still appears to be distinct 
from Gromia. 
Pleurophrys lageniformis, E. Sch,, (1 a) p. 204, pi. xiii. fig. 9. 
P. compressa, E. Sch., (1 a) ihid. 
Cyphoderia truncata^ E. Sch., (1 a) p. 203, pi. xiii. fig. 6. 
Difflugia (16). History of the genus given, and a list of 14 “ well- 
marked varieties ” given as belonging to the American fauna ; these (in- 
cluding two new forms, vide infra) are considered as forming but one 
species, though they are distinct according to Ehrenberg and others. 
D. acropodia, H. & li., (1 a) p. 114. 
Quadrula symmmetrica^ E. Sch., (1 a) p 112, pi. viii. fig. 6. Probably 
not a Difflugia (as Wallich says). 
Hyalosphenia lata^ E. Sch., (1 a) p. 110, pi. viii. fig. 5 ; and (20 a) where 
Tatem states that he figured it in M. Micr. J., 1870, as Difflugia ligata. 
Pyxidicula opercUlata^ Ehrb., (1 A) p. 110. 
Pseudochlamys patella, C. & L., (1 a) p. 107, pi. viii. figs. 1-3. A “ con- 
densed,” encysted state observed. 
Arcella vulgaris, Ehrb., (1 a) p. 79, and (2) p. 4, pis. i. A-D. Develop- 
ment at length (vide infra). 
Amphizonella flava, Gr., (17) p. 315, pi. ii. figs. 1-5, 8, 11, & 12. Show 
“ gymnomoneric ” and “ lepomoneric ” developmental stages, which per- 
haps represent phylogenetic stages. A . violacea, Gr., p. 464 ; nucleus 
resembles that of Foraminifera, outline not sharp. 
Chilomonas. Anteh, p. 3. 
Diselmis diinali, Duj., (21) is developed, according to the author, from 
Anisonema sulcata under the influence of the amount of salt in the 
water ; and itself tends to break into small masses under influence of a 
strong solution of the same. 
Anisonema sulcata (21) passes through stages resembling Amoeba, 
Chlamydococciis, Chlorococcus, and Heteromitas. 
Amphileptus moniliger, Ehrb., (17). The encystation as stated by Guan- 
zati is really such, perhaps affected by evaporation of the water, &c. 
Distigma (\1) shows a “ lepomoneric ” stage, and perhaps Euglena is 
one stage of it. Perhaps D. tenax, viride, and glaucum are but colour 
varieties of D. proteus. 
Huxley (13) thinks that Protamceba, Protogenes, and Myxodictyum, 
Hack., may be mere stages of a cycle of forms filled up by Myxastrum 
and Vampyrella. 
Pyrocystis (P. R. Soc. xxiv. pi. xxi.) is believed to be a shelled Noc- 
tiluca, not a Diatom (24). 
Protamceba primitiva (17 d) described. 
Vampyrella (17 d) and F. pendula, Oien., and V. spirogyrm (p. 367), 
diagnoses given. From Yalcuvia, in Italy. 
