190 LINNEAN SOCIETY OF LONDON. 
which yet re reason of certain peculiarities in their structure are in- 
capable of fertilisation by pollen and practically barren; while at the 
same time their structural defects fit them for becoming the nidus 
for the larvee of special insects. But when the ner in which 
these malfo lowers are disposed in the sib pies is inquired 
into, it becomes clear that through the interposition of insects these 
baeeuuays Urostigma 
F: 
Fics | Group II. Unisexual 
N ome he. 
th.— William Carruthers, F.R.S., President in the chair. 
Mr. i J. Barron, Mr. James H. Dugdale, see Mr. Edw ard B. 
were exhibited, and Mr. Baker commented thereon.— 
Professor Huxley read a paper entitled ‘‘The Gentians: Notes and 
Queries.” He introduced the subject by a few remarks wherefore 
his having been 7 to a =a ma the group, namely, abundance of 
Gentiana purpur campestris, G. verna, an . acaulis, at 
Arolla, Rhone Valley, 6400 tL ave sea-level, = where he passed 
the autumn of 1886. Taking the flower as a basis, he divides the 
Gentianee into two great series, each of which is chuieetaviond by a 
peculiar se of the nectarial monies and a gradation of 
forms of the lla 
aggregated in a single or two patches; his second ne i Meso 0- 
melita, are distinguished by a zone of socbealiny cells encircling 
flower or Us Gettin eee: = Aisa wuld lead on the o a cind 
to the series of the Peri rimelite, comprising four types eralaling or 
presenting modification of floral Serivtare: 1. AcrinantHE, whereof 
Gentiana aurea, with deeply cleft corolla, is representative ; 
2. Keratantue, hay aving the ge genus Halenia as typica THE, 
and Ophelia: 4. STEPHANANTHE, in which G. Amarella, with elon- 
gated campanulate corolla, ere the extreme of the perimelitous 
