Dr. F, Meinert on the Campodez. 361 
lies, and I retain for his orders the name of families given to 
them by Savigny and his successors. The entire suppression of 
the orders in M. Kinberg’s sense, and retention only of greatly 
multiplied families, according to M. Malmgren’s practice, is, in 
my opinion, to be regretted. 
Certain families of recent creation seem to me to be excellent— 
for example, that of the Spherodoride (Mlmgr.). It is also with 
pleasure that I find M. Malmgren reverting to the opinion of Oken 
and of MM. von Siebold and Max Miiller, and placing the Ster- 
ide among the Annelida. This author is astonished that, in 
the year 1865, M. de Quatrefages, in assigning to Sternaspis a 
place among the Gephyrea, should still mistake the head of these 
animals for the tail, without taking any notice of the beautiful 
anatomical investigations of MM. Krohn and Max Miller. I 
share in M. Malmeren’s astonishment, especially as neither 
Bianchi (Janus Plancus), Ranzani, nor Della Chiaje had fallen 
into the error of Oken and Otto, now corroborated by the au- 
thority of M. de Quatrefages. 
It is less easy to come to an understanding upon the genera 
than upon the families in the class of Annelida. Their number 
has been increased in very considerable proportions both by 
M. Kinberg and by M. Malmgren. Iam far from adopting 
the views of those naturalists, whose works have nevertheless 
been of great use to me, as willbe seen from nearly every page 
of the present memoir. The species investigated by them have 
been examined with extreme care, if-not as to their. anatomical 
construction, at least in their external zoological characters. I 
think, however, that among the characters considered by them 
to be generic, many have only a specific value, or may even serve 
at most to distinguish the varieties of a single species. This is 
the case especially with the denticulations of the sete, as I shall 
show by more than one example in the present memoir. I have 
nevertheless retained a great part of the generic groups of MM. 
Kinberg and Malmgren, but frequently only according them a 
subgeneric value. As a matter of course, however, among the 
genera established by these authors there are some excellent 
ones which every one will accept without hesitation. 
XLV.—On the Campodee, a Family of Thysanura. 
By Dr. Fr. Mernerr*. 
- Since J.C. Fabricius first drew the attention of entomologists 
to the systematic importance of the organs of the mouth in In- 
* Translated from ‘ Naturhistorisk Tidsskrift,’ ser. 3. vol. mi. p. 400. 
Copenhagen 1865. The Danish original is accompanied by a plate, from 
which the woodcuts are copied. 
