THE NAUTILUS. ey 
Nashville, Tennessee, and Jackson Co., Alabama, the latter collected 
by Mr. Sargent, have a strong, thick, white, testaceous deposit 
inside the base of the last whorl, with some nodules, apparently 
irregular, but equal in the specimens from either locality, which 
correspond to teeth or folds. ‘These testaceous deposits in different 
species are often smaller and thinner in mature shells than in ado- 
lescent, and sometimes entirely resorbed; they evidently are the 
same morphological element as the deposits and folds in Gastro- 
donta. 
5. I believe the fact must impress itself upon anyone that Zon. 
suppressus, especially the form noted above; gularis, also more in 
some forms, much resemble Z. ligerus, demissus, etc., and are nearly 
related to them, much more so than the latter are to the Mesomphix 
between which they are inserted in systematic works. ‘This feeling 
found its expression also in W. G. Binney’s “ L. & F. W. Shells,” 
where ligera, demissa, intertexta are ranged under the genus Hya- 
linia, the Mesomphix under Zonites. To this now comes the species 
announced under 3 above, resembling /igera as to the general con- 
figuration of the shell, and “ Gastrodonta” in the lamellz, which 
are of a somewhat peculiar type at that, approaching it to signifi- 
cans Bld. Some light on the significance of presence or absence of 
internal teeth is given also by Conulus fulvus, in which, as we have 
seen, such may be found or wanting in the same form from the 
same locality. And a character common to the two groups, valu- 
able even of higher order, seems to be the presence of a dart, in the 
genital organs, which would range them together in the genus Zoni- 
toides. It may be communicated here, previously, that I have 
found, in the upper part of the penis in Z. ligerus, suppressus, the 
forms mentioned under 3 above, and in arboreus a peculiar papilla 
(Reizkérper of German authors) in which a part is hard, sharp, 
projecting and (in the 3 former species) impregnated with carbonate 
of lime. 
6. Quite lately, Mrs. Andrews has sent me specimens of a Zonites, 
collected at Cranberry, Mitchell Co., North Carolina. They can 
be referred to none of the described species, and may prove to be a 
new one.’ The shell, of about 7 m. in diam., has two very small 
lamellz or teeth near the aperture, corresponding to the same Z. 
3 The n. sp., however, may be ‘‘ hanged in the smoke till cured,’’ or left in 
suspense till fully confirmed; it is, as sch, of little consequence, but of great 
importance as a form. 
