"^'iSi!^,i:t" ^MMm in the Uni.

150
MOLLUSCA.
Gibbulina modiolus (For.), radula examined. C. Semper, Nachr. mal. Ges.
ii. p. 103.
Gibbus (Gibbulina) bourguignali (Desh.), from Bourbon, rather too near to
G. bacillus (Pfr.), from Mauritius; also 67. intersecta (Desh.) very doubtfully
distinct from it. Nevill, J. A. S.B. xxxix. p. 410.
Gibbus (Gibbulina) versipolis (FtSr.) = funiculus (Val.), Bourbon, the living
animal of a rich dark orange colour. Nevill, ibid. p. 411.
OXYGNATHA (ZONITID^E).
The classification of the first family of Pulmonata proposed by
C. SEMPER is the following :—
Family Zonitidee. A mucous pore at the hinder end of the
foot. Jaw smooth, without ribs. Lateral teeth of the radula
subulate or bicuspidate.
Subfamily 1. Ceratophora. A horn-like prominence above
the mucous pore; under surface of the foot longitudinally divided
into three parts.
Tennentia, Parmarion, Euplccta, n. g., Macrochlamys, Dendrolimax (Dohrn),
Helicarion, Eurypus, n. g., Rotula (Albers), Martensia, n. g., Microcystis, Macroceros,
n. g. [Here should be inserted the American genus Stenopus or
Guppya.]
Subfamily 2. Aceratophora. No horn-like prominence above
the mucous pore; under surface of the foot not divided.
Ariophanta, Xesta, Rhysota (Albers), Zonites.
The anatomy of some Italian species of Limaxhas been studied
by F. SORDELLI, Atti Soc. Ital. xiii. pp. 1-12; his observations
lead him to distinguish the subdivisions of this genus in the
following manner:—
I. Internal shell inequilateral, dorsal keel incomplete. Sheath of the male
organ simple,
«. without flagelliform appendix: Eulimax, Moq.-Tand.
aa. as long as the matrix or longer: Limax dorice, dacampi, punctulatus.
bb. not half as long as the matrix: L. maximus, psarus, variegatus,
arbor um.
b. with a flagelliform appendix : Agriolimax, Morch, L. agrestis, L., and
filaiis, Hay.
II. Internal shell equilateral. Dorsal keel complete. Sheath of the male
composed of two parts. Milax, Gray, L. marginatus, Drap., gagates and
sowerbyi.
Ilevnemann's list of the slugs of Europe and adjacent countries enumerates
1* species of Limax, subgen. Heguemarinia,Miilm, two of the subgenus
Malacolimax, Malm, seven of the subg. Ayriolimax, Malm, one Lehmannia,
Heynem , five Amalia, Moq.-Tand., and one Lallemantia, Baudon, tho last
only from the Canary Islands; further 28 species, the generic place of