282 ON NEGATIVE HELIOTROPISM IN FUMARIA CORYMBOSA. 
Most of those recorded above are well-known European species. 
The following are rare iu the collection, numbers 4, 6, 7, 12, 13, 17, 
18. Numbers 6, 9, 22, 23, 27 are found at considerable altitudes 
in Europe ; number 7 is found in Europe, N. America, and S. 
Africa; number 21 in Europe and N. America. 
The following is the report of Grunow :— Zunotia prerupta, 
forma minor, also var. nubicola, Grun., and var. bigibba, Kuetz., 
which passes entirely into E. robusta, var. diodon, Qrun., so that 
it would be better to name the latter E. prerupta, var. Papilio. 
E. exigua, Breb., var. paludosa, | Navicula mutica (rare). 
N. borealis, var. subserians, and 
n. 
E. gracilis, Ehrenb. also var. intermedia. 
Diatoma vulgare, var. subacuta, | N. bisuleata, small variety. 
Grun. | N. Brebissonii, var. (rare). 
D. gracilis, Ehrenb. İN divergens, var. glacialis. 
Odontidium mesodon, var. parva, | N. divergentissima, Grun., narrow 
Grun. | variety. 
Cymbella — naviculeformis, var. |Stauroneis anceps, var. 
altissima, Grun. S. producta, Grun., var. subpro- 
C. stauroneiformis, var. ducta. 
Gomphonema augustatum, var. Melosira Roeseana, Rabh., variety. 
Note on Negative Heliotropism seen corymbosa, Desf. 
, By B. DAYpoN JAcEMos, Sec. L.S. 
[Read April 6, 1882.] 
A soMEWHAT remarkable case of negative heliotropism has been 
lately noticed by M. J. A. Battandier, Chief Physician to the 
Hospital at Mustapha, and Professor of Materia Medica at the 
Medical School in Algeria. Ina letter to the President, received 
a short time ago, he states that in this plant, which usually grows 
in the crevices of overhanging rocks, there is a curious provision 
for depositing the fruit in a secure place. After flowering, as I 
understand M. Battandier, the peduncle lengthens ; and, from 
being heliotropie, it bends away from the light towards any crevice 
which offers the greatest obscurity. This action of the plant is 
thus far advantageous to it, that in lieu of the fruit being scat- 
tered at haphazard, or falling in a direct line on to the sandy soil 
below, it is carefully deposited in a spot well adapted for the 
young plant. Following the usual course of the other species of 
the genus, the fruit on maturity would separate at the neck, and 
the corrugated shagreen-like outer surface would materially 
