FLAGELLATA, MONADS, &C. 
FroL 31 
mediuu. Membrane composed of plates. Longitudinal furrow accom- 
panied by the same lines and teeth as those of the “ handle ” of Dinophysis. 
P, pellucidum^ id. 1. c. figs. 46-48. Sea off Strib, Small Belt, Denmark. 
The structures surrounding the longitudinal furrow are homologous 
with the “ handle ” of Dinophysis. Variation not great. Plates compos- 
ing the skeletal membrane separated by narrow tracts, and their number 
constant; they consist of cellulose. No diatomin or chlorophyll, and appa- 
rently no starch, in the protoplasm. Between the edges of the transverse 
furrow there is a cleft for the egress of the contractile band. P. mi- 
chaelis agrees essentially with P. pellucidum in the structure of its skeletal 
membrane. 
Polykrikos'[~cricu8'] auricularia, Bergh, (32) p. 256, figs. 72 & 73. Strib, 
Little Belt, Denmark. Protoplasm differentiated into ecto- and endo- 
plasm. Thread cells. No chorophyll, diatomin, starch, or fatty matter 
could be detected, but remains of other organisms. Transverse fission 
takes place. 
Nuclearia. L. Maggi. Una nuova Nuclearia. Descrizione e con- 
siderazioui intorno al suo posto nella Sistematica, ed alia sua importanza 
ueir Ontologia Animale. Bend. 1st. Lomb. (2) xiii. [Not seen by 
Recorder.] 
The following Flagellata are described as new by Kent, (10) pp. 433- 
469, pis. xxiv. & XXV. : — 
Diplomastix ajjinis. 
Anisonema ludihundum, intermedium. 
Gymnodinium marinum^ lachmanni. 
Peridinium cequalisl-le']. 
Dinophysis caudata. 
Mallomonas freseni^ sp. n., or var. of M. plosslii, Perty. 
Astasia costata, Kunstler, (34) p. 747. 
Anisonema quadricostatumy Mereschko wsky , (13) p. 218, pi. xii. fig. 12, 
Sorrento, Bay of Naples. 
Trachelomonas acanthophora, Archer, (Rep. Dubl. Micr. Club) Ann. 
N. H. (5) vii. p. 342. 
Monas electrica, F. Krasan, Verh.J'z.-b. Wien, xxx. p. 289. Produced in 
emulsion of nut-kernels and water. 
Limnophysalis hyalina, reported, Gazz. Med. Ttal.-Lomb. xl. p. 208, to 
have been described as a new parasite from the blood of malaria patients, 
by Eklund. 
Pulsatella, Geddes, 1. c. p. 1086. Based on P. convoluta, id. ibid. 
Parasitic in mesoderm of the Planarian Worm Convoluta schulzi. Free- 
moving, pyriform, containing a large central contractile vacuole ; the 
wall near one end provided with parallel contractile fibril ; nest of coll 
granular. If placed in sea-water, the cell contracts rhythmically 100 to 
180 times per minute, becoming somewhat bent up. When quiescent, its 
nucleus oscillates from one side of the cell to the other. 
Protomyxoniyces, Cunningham. This writer, (33) p. 235, is inclined 
to believe the monad forms hitherto observed in choleraic and other 
1881. [vOL. XVI IT.] D 6 
