T E L E O S T E I .
ACANTHOPTERI.
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I I . Lucioperca, Cuv.
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III. Cottus, L.
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Thumb.
PHYSOSTOMI, MÜLLER.
. S i l u r o id e i , A g a s s iz .
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4 . S i l u r u s g l a n i s , L .
C y p r in o id e i , A g a s s iz .
V . Cyprinus, L.
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V I . Capoeta, Cuv.
6 . C a p o e t a S t e i n d a c h n e r i , K e s s l e r .
V I I . Barbus, Cuv.
7 . B a r b u s c o n o c e p h a l u s , K e s s . )
8 . , , l a c e r t o i d e s , , , > •Barbels.
9 . „ b r a c h y c e p h a l u s , , , 1
V I I I . S c h i z o t h o r a x , H a e c k e l .
1 0 . S c h i z o t h o r a x a k s a i e n s i s , K e s s l e r .
1 1 . „ F e d c h e n k o i , , ,
1 2 . , , a f f i n i s , , ,
1 3 . „ e u r y s t o m u s , , ,
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31.
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34-
35- 36.
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Rudd.
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„ u r a n o s c o p u s , , , I
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3 7 . A c i p e n s e r s c h i p a , L o v e t z k y .
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4 . „ a r g e n t a t u s , " . , ,
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7 . » l a b i a t a , , ,
MOLLUSCA [Mollusks).
By Ed u a r d von Ma r t e n s (Professor in the University of Berlin).
T h e following' description of Turkistan Mollusca is based chiefly upon
the materials collected by Fedchenko, and in addition there have been
included from the same region those very few species which were known
to science previously, viz., three species collected by P. P. Semenoff
in the Thian Shan, and one which was known, thanks to Messrs. Mid-
dendorff and Baer, from the Sea of Aral.
In the definition and determination of species, I have constantly had
in view that the matter referred to a country in which we might expect
perfectly new and peculiar forms, as well as many of the most widely
distributed European ones, and also such as are now known in the
farther parts of Asia. I have, therefore, considered it necessary to
carefully compare each of the species of Mollusca collected, first with
representatives of the European fauna, and afterwards with those made
known to us from the Himalayas by English students; and, if I did not
find constant and unvarying characters, I did not hesitate to consider
the species as known ; there are, however, many new species which for
the present may be considered as peculiar to Turkistan.
The naked Mollusca (Limax, Amalia) have been investigated and
described by F. D. Heinemann, of Frankfurt-on-the-Maine, and the
small fresh-water Mollusca (Corbicula minima, and Pisidium) by S.
Clessin, of Dinkelscherben, as they had for a long time specially
occupied themselves with these genera; they are consequently responsible
for the distinctness of the new species here described.
There can be no doubt that in the more mountainous parts of Eastern
Turkistan many land Mollusca will yet be discovered; it is very
astonishing, for instance, that in the whole of that region we have not
found a single species of the genus Clausilia.