ZOOLOGICAL LITERATURE. 
iGd. 
This paper contains : — 1 . A historical review of the labours of 
previous authors and collectors. 2. A list of the species of Avion 
and Limax observed by the author in this kingdom^ with remarks 
on their synonymy and distinctive characters. 3. Additions 
towards the determination of several species named in a list by 
Seckendorf (1846) ; three species are added, viz. Hyalina con- 
torta (Held), Balea fragiliSj and Planorbis glaber. The Re- 
corder may mention here that he has been convinced of the 
occurrence of Clausilia filograna by Prof. Alex. Braun, and 
therefore withdraws the doubts expressed by him in this re- 
spect. 4. A list of 115 species of Mollusca hitherto found in 
Wiirtemberg, enumerating the localities for the several species, 
the entire area being divided into four hydrographical and five 
geological sections. 5. General remarks on the frequency or 
rarity, and on the geographical range of the species. Helix 
hortensis is more common than H. nemoralisy especially in the 
more elevated parts; Helix arbustorum is rather local in the 
lower regions and very common in the higher. Among the 
Clausilice the most frequent is CL biplicata (Mont.). Buliminus 
detritus, Miill., is very local, but occurs, where it is, in great 
numbers ; it is found only in localities exposed to the sun, either 
vineyards or barren rocks. Helix candidula, Clausilia parvula, 
and Pupa frumentum prefer limestone ground. Pupa avena, 
secale, dolium, doliolum, and Helix rupestris are, within this 
province, entirely limited to it. 
Paludina vivipara has been found only on the frontiers 
of the kingdom towards Bavaria, and the occurrence of Pla- 
norbis corneus has not been positively confirmed ; which two 
facts suffice to characterize this part of South Germany as 
a country of hills and elevated plains. Neritina fluviatilis 
lives only in the river Neckar and its tributaries, the genus 
Neritina being generally absent in the upper parts of the 
Rhine as well as the Danube. Paludina vivipara is not found 
in the Lake of Constance, although it is common in Bavarian 
lakes belonging to the system of the Danube. Thus Limnceus 
'stagnalis,palustris,auricularius,k,c., 2 ive the only freshwater shells 
of large size generally distributed over the country. Dreissena 
polymorpha has not yet been observed. 
• Bielz, E. a. Systematisches Verzeichniss der Land- und Siiss- 
wasser-Mollusken des ostreichischen Kaiserstaates. [Sys- 
tematic list of the land- and freshwater Mollusca of the 
Austrian Empire.] Verhandl. und Mittheil. des sieben- 
biirg. Vereins fur Naturwiss. in Hermannstadt, vol. xvi. 
1865, pp. 132-142, 158-162, 173-186, 204-210, 223-234. 
There are enumerated 6 species of Avion, 7 Limax, 1 Amalia 
{^=Milax, Gray), \ Testacellus (Triest), 1 GJandina, 4^ Daude- 
hardia, 15 Hyalina, 6 Zonites, 6 Vitrina, 3 Succinea, 99 Helix, 
