THE MYXOMVCETES. 
IGl 
Order VII. CALONEME.E. 
Family 16. Perich^nace^. 
Genus 33. Perichcena. 
Family 17. Arcyriaoe^. 
Genus 34. Cornuvia. 
„ 35. Arcyria. 
,, 36. Lachnobolus. 
,, 37. Dermodium. 
„ 38. Ly cogala. 
„ 39. Oligonema. 
Family 18. Trichiace^. 
Genus 40. Prototrichia. 
„ 41. TricTiia. 
„ 42. Hemiarcyria. 
It will be seen tbat the proposed arrangement differs considerably 
from the older one, but we are unable to detail the orders and genera 
here, without which the method cannot be understood. Suffice it 
to say that external features are but slightly regarded, and that 
structural differences and details take precedence. Two primary 
divisions are based on the colour of the spores, subsidary to these 
the presence or absence of a capillitium constitute in each a sub- 
division. The position of honour is undoubtedly assigned to the 
columella and capillitium, or whatever occupies their place. The 
character of the capillitium, when present, its mode of attachment, 
method of ramification, external markings, thickness, and combina- 
tions, all bear some relation to the classification, so that we have, 
to a large extent, a system based on the capillitium, an internal 
structure which can only be determined by the use of the micros- 
cope. The presence or absence of lime is an accessory feature. 
We have, in the new arrangement, perhaps, manifested the usual 
tendency to rebound from one extreme to the other ; from a total 
disregard of microscopical structure, to an entire ignoring of 
external features. This is a fault which will ultimately correct 
itself, as experience may dictate. We would venture to think that 
some modifications in this direction will be inevitable ; nevertheless, 
as far as we can judge, there is a completeness and unity in the 
system, a soundness in the principles which lie at the foundation, 
and, notwithstanding any minor faults, that it is a thorough reform 
of the Myxomycetes, for which mycologists will have reason to 
respect and honour its indefatigable young author. With the 
prospect of a long career before him, it may be hoped, and antici- 
pated, that he will do similar good work in other directions, for 
this is by no means the only group in which a thorough reforma- 
tion was needed. One desire will be shared by many that the next 
Monograph may not be written in Polish by an author equally com- 
petent to produce it either in Latin or French. 
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