174 
MICRO-ORGANISMS IN SUTTON PARK. 
Tetmemorus Brebissonii. 
,, granulatus. 
Benin m margaritaceum. 
Closterium lunula. 
,, acerosum. 
Closterium acuminaturn . 
,, graciU. 
,, parvulum. 
Spirotcenia condensata. 
Among the desmids Closterium lunula was very abundant 
and fine. I called Dr. Anthony’s attention to the remarkably 
strong manifestation in this species of the circulation of the 
granules in the protoplasm, and we examined them together 
under his -^-til-inch objective. We could see two rapid 
currents of granules coursing down the edge of the frustules 
in opposite directions in very definite channels. Such 
rapidity and definiteness of the circulation in desmids neither 
of us had ever seen before. I have often seen the swarming 
of the desmids from this locality, especially in Micrasterias, 
when the whole protoplasmic contents seem to be in a boiling 
state. It is remarkable that no biologist has yet been able to 
explain satisfactorily either the circulation or the swarming. 
An interesting occurrence of abnormal growth in Clos¬ 
terium lunula found in this locality is worthy of note. A very 
similar growth is figured by Mr. Archer in the “ Quarterly 
Journal of Microscopical Science,” 1860, pi. XI., fig. 5. I 
believe it is the result of a parasitical fungus, Olpidium.* 
Of the other algae I have only identified the pretty 
spherical Eremosphcera viridis. figured in Plate I. of Cooke's 
‘‘ British Freshwater Algae.” The different species of 
Oscillatoria and Spirogyra and some other filamentous algae, 
often present, I have as yet not identified sufficiently to 
distinguish the species. 
Khizopoda. 
Amoeba Proteus. 
,, verrucosa. 
,, radiosa. 
Difflugia pyriformis. 
,, acuminata. 
,, spiralis. 
,, urceolata. 
,, corona. 
Xebela coronis (or D. lobostoma ?) 
A reel l a vulgaris. 
Centropyxis ( Arcella ) aculeata. 
Actinophrys sol. 
A ctinosplucn inn Kicliliornii: 
A can th ocystis ch vetoph ora. 
Biomyxa vayans. 
Euglypha sp. (empty case 
only). 
Cyphoderia ampulla. 
Of the Khizopoda, the Amoeba Proteus was remarkably 
large and fairly abundant. I would call attention to the 
peculiar markings on the Diffiugiae, corresponding well with 
* Figured in Cooke’s “ British Freshwater Algae,” pi. 81, fig. 2. 
