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

164
MOLLUSCA.
Gen. Seymentina, Flem., subgen. Planorbula, Hald., type armigera, Say,
and Segmentina proper.
? Subfam. CAMPTOCERDST^E.
Gen. Camptoceras, Bens.
Subfam. POMPHOLIGIN^E.
Gen. Pompholyx, Lea.
Gen. ? Clioanomphalus, Gerstf. Animal unknown.
Gen. Cavinifex, Binn.
The Ancylidce, including also Gundlachia and ? Latia, the Physidce, and
the Chilinidee elevated to the rank of distinct families.
Chilina ovalis, Sow. Lingual dentition described and figured by Dall,
Ann. Lye. N. York, ix. p. 347.
Pseudocliilina, n. g. Shell thin, covered with a rough fibrous epidermis,
spire elevated, acute. •— Ps. limnceformis, sp. n., Chili, The broad plicate
columella distinguishes it from Limncea. Doll, /. c. p. 357.
Limncea, group Gulnaria, Leach, or Radix, Montf. The European
species of this group have been carefully revised by Dr. W. KOBELT.
He remarks that none of the species or true varieties are rare in
their localities, and that every so-called species which is said to
occur in but few specimens is to be suspected; similar conditions
may give similar features to different species, and so cause corresponding
varieties of distinct species, which live in the same
locality. Among the more striking of such cases are the lacustrine
varieties, living in large inland lakes, and distinguished by
a more solid shell and shortened spire from the types of their
species. The author gives the following species and varieties:—
1. auricular in, Drap., type pi. 1. fig. 1, var. costellata fig. 2, var. ampla,
Hartm., fig. 3 ; monardii, Hartm., pi 2. fig. 4, is rather an individual form (as
also var. collisa, Moq.-Tand., and gibbosa), var. minor fig. 5, var. obtusa
fig. 6, var. tumida, Held, fig. 7, var. ventricosa, Hartm., pi 3. fig. 8.
2. vulgaris (Rossm., not C. Vl.)=acutalis, Morelet, acuta, Jeffr., biformis,
Kuster [and lagotis, Schranck, the oldest name], type pi. 3. fig. 9, var.
alata fig. 10.
3. ovata, Drap., typical form pi 3. fig. 11, var. inflata pi. 4. fig. 12, var.
unipullaeea, Rossm., fig. 13, var. dickinii fig. 15. Mal. Bl. xvii. pp. 145-166,
with 4 plates.
Limncea, sp., between stagnalis and auricularia, probably stagn. var. lacustris,
from the Walchensee, Bavaria. Walser, Nachrichtsbl. mal. Ges. ii. p. 94.
Limne/a rosea, v. Oallenstein, is to be regarded as a lacustrine variety of
vulgaris, Rossm. Kobelt, Nachrichtsbl. mal. Gesellsch. ii. p. 127, afterwards
given as a variety to L. peregra. Mal. Bl. xvii. p. 180.
Limnaa glabra, Miill [elongata, Drap.], very small, only 5 millims. long.
V. d. Broeck, Ann. ma! Belg. iv. (!»(>'.)) p. 80, pi. 2. fig. l.—L. elongata,
Drap., and palustris, Miill, var. from Hamburg described by II. Strebel,
Nachr. malak. Ges. ii. p. 124.—I. fusea, C. Pfr., var. gracilis, Pirona, from
Friuli by E. de Betta, Malac. Veneta, p. 124.
Limncea martorelli, sp. n., Bourguignat, R. Z. 1870, p. 167, Estanque de Bagnolas
in Catalonia.