GEOGRAPHICAL DISTRIBUTION. 
121 
gives a list of 25 species of land and 36 of freshwater shells observed near 
Hamburg, and adds some others from Holstein. Nachr. mal. Ges. ii. pp. 74-76. 
Belgium. Colbeau (Ann. mal. Belg. vol. hi. 1808, pp. 85-111) enume- 
rates 103 land and 74 freshwater species from Belgium (besides 7 sub- 
marine species as Alexia, Otina, and Assiminea) ; a few new species and 
some varieties are represented on three plates j the names of them will 
be mentioned in the special part. — Numerous particulars referring to malaco- 
logical excursions and observations on various species by MM. Weyers, 
Colbeau, Stacs, Malzine, Leconte, E. van den Broeck, and A. Craven will be 
found in tlie proceedings (Bulletin des Stances), which are printed with the 
^Annales.’ We shall only mention out of them that in the numerous and 
largo ponds in the heath of La Campine, near Antwerp, no other mollusk 
can be found than Pisidium casertanum, var. lenticulare ) Weyers (vol. hi. 
p. xx) records Physa acuta (Drap.) as a new species for Belgium, having 
been found at Blankenberg by Malzine, vol. hi. p. Ivii, and by E. van den 
Broeck at Brussels, vol. iv. p. xcv, and that the same has observed Bithynia 
[better Ilydrohia'] vitrca, var. hidimoides (Mich.), in the province of Antwerp, 
in a ditch filled with Elodca canadensis, vol. iv. p. xcv. The following 
volume, destined for 1870 but published in 1871, also contains accounts of 
malacological excursions by E. van den Broeck, and Mourlon and Purves, 
the last relating to the Belgian Ardennes. 
Silesia. G. Bohbmann has described a malacological excursion in the 
Silesian Mountains (Nachr. mal. Ges. ii. pp. 172-176). O. Reinhardt has 
given a malacological monograph of the mountain Zobten ,• he enumerates 
47 species of land and 3 of freshwater shells found on its slopes, two of them 
only not observed by hirtiself. The most remarkable are Helix solaria, 
Menke, Hyalina glahra (Stud.), Clausilin cruciata. Stud., Cl. silesiaca, 
A. Schmidt, and Helix carpatica, Eriv., the last not observed there by 
himself, none of which are found elsewhere in North Germany; so that the 
Zobten appears to be an outlying post of a Southern or Carpathian fauna. 
Nachr. mal. Ges. ii. pp. 185-196. — A supplement to the enumeration of the 
land and freshwater mollusca found near Gorlitz is given by O. v. Mollen- 
BOEFF in the Abh. Ges. Gorl. vol. xv. 
Thuringia. Dufft enumerates 18 species of land and 42 of freshwater mol- 
lusca observed by him at Rudolstadt ; among them may be mentioned : — Helix 
cricetorum, Miill., on limestone with dark bands, on sandy ground always pale ; 
H. holoserica. Stud., and personata, Lam., rare ; Bidimus radiatus, Brug., 
= detritus (Miill.), plentiful, but only on oolitic rocks ; Clausilia hiplicata 
(IMont.) and laminata (Mont.) in the proportion of 5 to 1 ; Clausilia ventricosa, 
only on rotten wood ; C. nigricans (Pult.) only on schistaceous soil ; Cl, 
parvula, very common ; C. 2dicata,'Drx^., rare. Nachr. mal. Ges. ii. 
pp. 108-110. — A number of land and freshwater mollusca obtained at 
Liebenstein are mentioned by II. C. Kustee, Ber. Ges. Bamb. viii. pp. 82-39. 
Hesse. 0. Speyee enumerates 46 species of land and 30 of freshwater 
mollusca observed at Fulda, B. Ver. Naturk. Fulda, i. pp. 1-27. — II. Ickeath 
gives a list of 36 land and 18 freshwater shells found by him near Darm- 
stadt. Nachr. mal. Ges. ii. pp. 38-41. 
The numerical proportions of the small land-snails found in the recent 
sediment on the banks of the Main are given by Heynemann (Nachr. mal, 
Ges. ii. p. 147). Ptqm muscorum and Helix pidchella, including cosiata, are 
1870. [vol. VII.] K 
