FLAGELLATA. 
Prot . 10 
the one side into AZ^a-like organisms, and in another direction into 
organisms which seem to belong to the category of fungi. Under the 
influence of the sun’s rays, the uncoloured Flagellata develop chlorophyll. 
“We see thus the beginnings of two kingdoms, animal and vegetable, 
radiating from one common stem. We see the transformation of one of 
them into the other, not only in its morphological features, but also in 
its physiological functions, under the direct influence of physical and 
chemical agencies.” New Members of the Infusorial Order. 
Stein, F. von. Der Organismus der Infusionsthiere. in. Abth., ii. . 
Hiilfte, Der Organismus der Arthrodelen Flagellaten. Leipzig : 
1883, 30 pp., 25 pis. [ Cf \ J. R. Micr. Soc. (2) iv. pp. 70-72.] 
The present part does not complete the genera and species from the 
first half of pt. ii., but constitues a monograph of a suborder of the 
Flagellata. The Flagellata are divided into two suborders : (1) The 
Monero-flagellata , described in the first part ; (2) The Arthrodelo-flagel- 
lata , now described : these are practically the Cilio-fiagellata , which term 
Stein discards. He distinguishes 5 families : (1) Prorocentrinidce — Pro- 
rocentrum, Ehrbg., Dinopyxis , g. n., Cenchridium, Ehrbg. ; (2) Clado- 
pyxida — Cladopyxis , g. n. ; (3) Peridinidce — Gymnodinium, g. n., Hemi- 
dinium , g. n., Glenodinium , Ehrbg., Clathrocysta , Heterocapsa, Amphidoma, 
Oxytoxum, Pyrgidium , Ceratocorys, Goniodoma , gg. nn., Gonyaulax, Dies., 
Blepharocysta, Ehrbg., Podolampas, g. n., Diplopsalis, Bergh, Peridinium , 
Ehrbg., Cemtium , Schrk. ; (4) Dinophy sides — Amphidinium , 0. L., Pha- 
lacroma , g. n,, Dinophysis , Ehrbg., Amphisolenia , Citharistes , Hislioneis, 
Ornitlioccrcus , gg. nn. ; (5) Noctilucidcc — Ptychodiscns , Pyrophacus, gg. tin., 
Noctiluca, Surir. 
The following are described and figured : — Prorocenirum micans , 
Ehrbg., P. dentatum, sp. n., P. rostratum , sp. n. ; Dinopyxis dactylus , g. 
& sp. nn., D. vaginula, sp. n., D. Icevis, sp. n., D. compressa , Bail. (= 
Pyxidicola compressa , Baily, erroneously considered as a Diatom) ; Gen - 
clirulium [= Cenchridium , Ehrbg., and Entosolenia , Williamson, Stein 
considering it to be a Flagellate and not a Foraminifer !] globosum , 
Will., C. sphcerula , Ehrbg., C. rngulosum, C. tridactylum ; Cladopyxis 
(Ehrenberg’s Xantlddium from {flint) brachiolata , g. & sp. nn. ; Gym- 
nodinium , g. n., G. fuscum , Ehrbg., (7. ccruginosum, G. vorticella , spp. nn. ; 
Ilemidinium nasutum, g. & sp. nn. ; Glenodinium oculatum , sp. n., 6r. pul- 
visculus , Ehrbg., Or. cinctum , Ehrbg., Or. foliaceum, sp. n., (7. trochoideum ; 
Heterocapsa, g. n., PT. triquetra, Ehrbg., H. umbilicata, sp. n., H. quadri - 
dentata , sp. n. ; Clathrocysta aculeata , g. & spp. nn.; Gonyaulax poly [Ii]e- 
dra, sp. n., Or. spinifera , C. & L., (7. polygramma, sp. n., Or. birostris, sp. n.; 
Amphidoma nucula , g. & sp. nn., A. acuminata , sp. n. ; Oxytoxum scolopax f 
g. & sp. nn., 0. cribosum f 0. diploconus, sp. n., O. gladiolus , sp. n., 0. sphce- 
roideum , sp. n. ; Pyrgidium reticulatum , g. & sp. nn., P. constrictum, sp. n., 
P. sceptrum. sp. n., P. mitra, sp. n., P. tessellatum , sp. n. ; Ceratocorys 
horrida, g. & sp. nn. ; Goniodoma , g. n., (7. acuminatum , Ehrbg. ; B/e- 
pharocysta splendor -maris, Ehrbg. ; Podolampas bipes , g. & sp. nn., P. 
palmipes , sp. n. ; Diplopsalis lenticula , Bergh ; Peridinium globulus , 
sp. n., P. michaelis, Ehrbg., P. tristylum , sp. n., P. divergens , C. & L., P» 
