RniZOrODAj MONADS, FLAGELLATA. 
Trot. 3 
isms” (Allman, J. L, S. xviii. pp. 261 & 385), is a summary of the most 
important recent work among Rhhopoda^ describing the chief species 
and the views of different writers upon them, with woodcuts. 
Leidy, P. Ac. Philad. 1877, p. 321, notices the observation of 
Difflugia cassis and glohularis, Trinema acinus, EuglypTia alveolata and 
brunnea, in moss eight feet from the ground. On the feeding of Din- 
amosba ; id. tom. cit. p. 288. Apparent discriminative power in the selec- 
tion of food by a Hcliozoon\ id. tom. cit. p, 291. On Chilomonas \ id. 
tom. cit. p. 198 (notices the finding of a species on the beach. Cape May, 
. N. Jersey). 
Myxastrum, perhaps a new species of, observed by E. P. Wright, at 
Howth, with marine Algm ; Q. J. Micr. Sci. xvii. p. 562. 
Hackel revives the discussion of the nature of Bathyhius in Kosmos 
(Zeitsch. f. Entwickelungslehre, &c.. Leipzig), in his paper “ Bathybius 
und die Moneren ” (1877). 
Genera, Species, &c., referred to. 
Acanthocystis turfacea, Cart., (12) p. 334. Shows distinct superficial 
and “ Mark ’’ substances ; a nucleus in the latter, with fine fibrils radiat- 
ing from it to the superficial substance. 
Acanthocystis aculeata, (12) p. 337, pi. xx. figs. 1-6. Gives the same 
results. 
Actinolophus pedunculatiis (12). The same in these structural points. 
This species described, (1) p. 72. It sometimes contains a capsule, with 
distinct plates, perhaps indicating encystation ; the protoplasm then 
divides into halves. 
Actinosphccrium (12). Shows the fibrils without the nucleus. 
Actinosphccrium eichhorni is mentioned, and its structure, &c. (as given 
by him in 1873), recapitulated by Greef, in Arch. mikr. Auat. xiv. 
p. 167. Cf. also (9), where Greef s results are said to be in the main 
confirmed. 
Acanthocystidoe (12). In development, some show two nuclei ; budding 
also takes place, the bud cleaving into amoeboid germs. 
Actinophrys sol (12). Observed to send out a number of bi-ciliated 
amoeboid bodies. 
Hedriocystis pellucida, H. & L., (1) p. 67, described. 
Clathrulina elegans, Cien., (1) p. 68, described. It is thought that it 
should be placed in the same genus as the preceding. 
Lithocolla globosa, F. E. S., (1) p. 75. Perhaps not a Heliozoon. 
Dictyocha (24), probably a Rhizopod, between Thalassicolla and the 
siliceous sponges. 
Tolytrema halaniforme (4) = Carpenteria (Gray) halaniformis ; 
locality should be Polynesian Seas. Dnjardinia (Gray) is a var. of the 
same. 
Tolytrema miniaceum, var. album (4), distinguished from Carpenteria 
and young Tlanorbulina larvata. 
Tinoporus vesicularis (4) should be Calcarina vesicularis. 
Ovulites (20). The genus to be referred to the porcellanous Forami- 
1877. [vOL. XIV.] C 5 
