SUPPLEMENT. 
391 
lacunose septa are placed against tlie convex side ; in Ascoceras 
against the concave side. Only one species of Clioanoeeras is known, 
viz. C. mutahile (fig. 84, G, H). 
Dr. Lindstrdm considers that BUJingsites, Hyatt (placed by that 
author with Mesoceras in the family Mesoceratidce^ H}’att), should 
be “ placed amongst the Ascoceratidce near Glossoceras^ on account 
of its contracted aperture, while OjAiidioceras may keep its more 
natural place amongst the Lituitidce, which has been given to it by 
Earrande.” 
Under the Lituitidce, Dr. Lindstrom describes two species of 
Ophidiocercts (see p. 8 of this volume), viz. 0. reticidatum, Angelin, 
and 0. rota, sp. nov. He remarks that there is nothing to be added 
to the generic characters of the genus as laid down by previous 
authors, except that the body-chamber is of extreme length in all 
the Gothland species sectioned. It occupies more than one whorl, 
and sometimes even exceeds two. 
Since the earlier pages of the present volume were in type, treat- 
ing of the Lituitidce (see pp. 1-14), an important memoir has been 
published by Dr. Adolf llcmele, entitled “ Untersuchungen iiber 
die Yersteinerungsfiihrenden Diluvialgescliiebe des norddeutschen 
Flachlandes, mit besouderer Beriicksichtigung der Mark Branden- 
burg,” i. Stuck, 3 Lief., Berlin, 1890 ; pp. 108, plates 1-0. In 
Part i. of this paper the author describes and figures tlie following 
species of Litvites, viz. : — 
L. lituus, Montfort, 
L. perfectus, AVahlenberg, 
L. Haejeni, sp. nov., 
L. Declieni, sp. nov., 
L. heros, sp. nov., 
L. applanatus, sp. nov., 
L. Danclcelmanni, sp. nov., 
And one species of Pcdceonautihis, P. hosj)es, sp. nov. 
Part ii. treats of the geometrical form of the shell, its sculpture, 
structure, &c. ; concluding with a tentative classification of the 
different genera and subgenera included by Eemele in the family 
Lituitidce. 
