530 
= 
make this termination significant every time, it should appear no- 
where in the system outside of family names. 
2. For the ordinal name no termination could be better than 
that of -a/es.* Long usage as a “ Cohort” name, simplicity of af- 
fixing and pronunciation, clearness and brevity, all recommend it. 
If used it ought to be used exclusevely for orders; it would then 
characterize at sight the rank of the group name as the termina- 
tion -zdae does the family in zodlogy. 
3. The names should as far as possible be affixed to the names 
of representative genera or, if not, be derived from some striking 
characteristic or feature of the group. Family names, for obvious 
reasons, should always be of the former class. 
4. Miscellaneous group names need not be retained after their 
usefulness in the system ceases to exist. Where an older name 
occurs which is practically an order, in the modern sense, it is de- 
sirable, where simplicity can be preserved, to so modify the old 
name as to conform in termination with the new system, but the 
rules of priority accepted for genera and species need not neces- 
sarily apply to either family or ordinal names. It would seem 
better to attain uniformity of usage by other means. 
As a further means of illustrating this simplicity I append the 
ordinal groups that I am accustomed to use in presenting the rela- 
tionships of the fungi to students. Nothing is claimed for it ex- 
cept an adaptation of the principles above recommended to the 
system believed to be nearest in accord with modern research.f 
ae ea 
* Compare the discussion of this subject, this journal, 22:.124-129. It is only 
fair to state that when that paper on the classification of the Archegoniates was 
written I had not seen Engler’s Sy//abus der Vorlesungen, which contains certain 
divisions similar to those suggested in my paper and necessarily antedating it He 
uses the same termination -a/es for orders, but not uniformly, nor exclusively for 
groups of that rank. 
+ At present I am using the foliowing presentation of the leading*groups of Algae: 
Class BACILLARIAE—with one order: DIATOMALES 
Class CYANOPHYCEAE —with 4 orders: CHROOCOCCALES, OSCILLARIALES; 
NOsTOcALES, SCYTONEMALES. 
Class CHLOROPHYCEAE—with 6 orders: ProrococcaLss, CONJUGALES, SIPHON: 
* ALES, CONFERVALES, COLEOCHAETALES, CHARALES, ee 
Class PHAEOPHYCEAE—with 3 orders: PHAEOSPORALES, DICTYOTALES, Fu- a 
_CALEs, oe 
Class RHODOPHYCEAE—with 5 orders : BANGIALES, NEMALIONALES, Cryero- : 
ee ee, oo | 
