Ayes Miscellaneous. 
after all, as originally supposed by Ehrenberg. Their gradual 
diminution in size towards the posterior pole, where they are néarly 
atrophied, would seem to indicate that they were in some way 
related to the power of the organism to move in a definite direction, 
the cells of the anterior end being provided with the best developed 
visual, sensory apparatus, or whatever it may be. If it should prove 
possible to show that these “ eye-spots ” are really sensory organs 
in Volvow, as al! the facts which have been here noted would seem 
to indicate, it would be one of the few instances known of a plant 
possessed of visual or sensory organs of any kind, unless we except 
some such plants as the Venus’ fly-trap. 
The speaker stated that he had been unable to find any notice of 
any of the features of Volvox which are here described; all of the 
figures to which he had had access in standard works were entirely 
erroneous from their authors having completely overlooked these 
very salient and important features of this remarkable plant. This 
should therefore be regarded as his apology for bringing a very 
common organism to the notice of the Academy and to the renewed 
attention of the microscopists who take pleasure in studying it. It 
is to be hoped that some one who is skilled in such work will be 
induced to take up the study of Volvox anew and publish a well- 
executed drawing of a colony in which the facts here recorded are 
adequately represented. This is all the more desirable in that, if 
Volvow is really a plant, its psychological history should be as much 
a matter of interest as its singular beauty and its intricate methods 
of reproduction seem to have been.—Proc. Acad. Nat. Sci. Philad. 
May 21, 1889, p. 138. 
On a Gall produced in Typhlocyba rose, Linn., by a Hymenopterous 
Larva, By M. A. Grarp. 
During last October the trunks of the horse-chestnuts in the 
Luxembourg Garden were covered with thousands of dead specimens 
of Typhlocyba rose, with the wings half open, and slightly attached 
to the bark, as if they had been killed by an Entomophthorean. 
The under surface of the leaves also bore a great number of dead 
specimens of this insect. By microscopic examination I could not 
detect any trace of Cryptogams. However, as R. Thaxter has 
lately noted the facility with which Typhlocyba rose and mali when 
infested by Entomophthora spherosperma, Fres., completely discharge 
their spores, I thought I must have come upon the scene too late, 
and left a more complete observation to the summer of the present 
year*. I must confess that my curiosity was much excited by the 
* Typhlocyba rose lives usually upon roses, apple-trees, and other 
Rosaceous plants, and often causes great mischief in gardens. I do not 
think that it has ever been indicated upon the horse-chestuut. In spite 
of a careful examination I have been unable to find characters clearly 
separating the variety e@scwli from the type. M. Lethierry, whose know- 
ledge of the Hemiptera is so great, ascribes the few differences observed 
to the action of the parasites upon the Typhlocyba. However, the Typhlo- 
cybé which have become adapted to the horse-chestnut seem to neglect 
the roses planted in the vicinity. 
