APPENDIX. 347 
refers to his life-work as ‘‘a contribution towards the knowledge 
of a single character among the many that must be taken into 
account in making a natural classification.” 
Several other recent attempts to classify the mollusca upon 
single or partial characters are equally or more incongruous ; 
and were therefore omitted from my chapter on classification. 
On Collecting and Arranging Shells [p. 290]. 
The new liquid glues sold by stationers, such as “ Royal,” 
“Chase’s,’? Lepage’s,” etc., are highly recommended for 
attaching specimens to the eardboard labels. They have a 
ereat advantage in being always ready for use, but do not 
possess suflicient body to fix heavy specimens in every position 
desired; this deficiency may be supplied by the use of yellow 
wax, which may be moulded to any shape required, and then 
attached with the glue both to the cardboard and specimen. 
[ Vou. IT.] 
CEPHALOPODA. 
[P. 46.] 5th line from bottom, instead of “liassic,” read 
r jurassic.” 
ACANTHOTEUTHIS, Wagner [p. 48]. 
PHRAGMOTEUTHIS, Mojsisovics, 1882. Triassic; Europe. A. 
bisitnuatus, Bronn. 
OrTHOCERAS, Breyn [p. 51}. 
5th line from bottom, instead of “ L. Silurian,” read “ Cam- 
brian.” 
ENDOCERAS, Hall; CAMEROCERAS and DIPLOCERAS, Conrad. 
The two groups, Endoceras and Cameroceras, appear to be 
very closely allied, if not identical forms; the latter being 
founded upon a species (C. Trentonensis) possessing an inner 
sheath or tube which is permanently attached to the septa in 
precisely the same manner as that of Endoceras, and differing 
simply in its lateral position, beaded form, and more gradual 
expansion ; the tube of Endoceras, moreover, is not always cen- 
tral. Its expansion is more rapid, when it occurs; there are 
also occasionally additional and apparently free tubes within the 
first or permanent tube of Endoceras, which do not occur in 
Cameroceras. ; 
Diploceras appears to have possessed an inner tube of large 
size, surrounded by septa and an outer tube, the inner tube being 
near one side of the outer one; it also is probably identical with 
Endoceras.— WHITFIELD, Geol. W isconsin, iv, 228. 
RHYNCHORTHOCERAS, Remelé, 1881. (Ancistroceras, Boll [part], 
1857.) O. Breynii, Boll. L. Silur.; Germany. 
