NOTES AND MEMORANDA. 99 



layer of cells, and containing twelve to twenty broadly oval 

 spores. Of this genus but one species is described^ found on 

 Gelidium cartilaginum. 



Entocolax (n. g., Reinsch) contains but one described 

 form ; here the whole plant is entophytic, itself seemingly 

 composed of slender cells radiantly disposed in series, and 

 spreading in cavities of certain monstrous curiously-lobed or 

 horned cellular excrescences of the host-plant (here Bo- 

 strychia growing on Gelidium cartilagineum) , its fructification 

 wholly unknown. This curious production, the author seems 

 to think, may take origin within the cavity of a cell of the host- 

 plant, but this is surely very questionable. At any rate the 

 young and very minute cellular plant is wholly included by 

 the adjacent parenchym of the infected plant. More advanced, 

 the expanded cavity seems to be covered by a laminated 

 lining, in which nidus is seated the parasite. The curious 

 horned excrescences on the host-plant are similar to those 

 sometimes induced by and accompanying certain other para- 

 sites appertaining to Choreocolax, and are more minutely 

 cellular than the normal tissue. How propagation of this 

 remarkable parasite (referable, like Choreocolax and Syrin- 

 gocolax, to Rhodophycese, but of uncertain position therein) 

 can be effected remains a marvel. 



Pseudoblaste is the name of a new genus (of three species) 

 formed by Reinsch for certain obscure little productions 

 growing on the surface of other Rhodophycean algae, and 

 forming little convexities composed of homomorphous cells, 

 arranged in vertical or radiate series or irregularly scattered, 

 and enclosed in a sharply bounded, nearly hemispherical or 

 lobed, colourless matrix, closely adherent to the plant on 

 which they live, but wholly without any organic cohesion 

 therewith. 



Coming to Chlorophyllophycae, a new form, amongst some 

 others, referred to Chroolepus, is found to be a true parasite 

 living in certain Jungermannieoe. In many cases the author 

 observed the parasite, not only in the intercellular spaces, 

 but within the cavity of the cells. The cells become some- 

 times wholly embraced by the growth of the parasite and dis- 

 joined, such being mostly without chlorophyllaceous granules, 

 and the plasma densely and finely granular. 



The author establishes a new genus under the name of 

 Chromopeltis, for certain forms living attached to the leaves 

 of mosses ; these are disciform, subcircular, or irregularly 

 lobed, composed of irregularly-figured cells, sometimes 

 running into radiant series ; contents finely granular, and 

 colour dusky green. The figures convey the idea of plants 



