Dear Roma,
>
>Bartsch, 1929
Many papers this year! Refine your data
>
>Dall, 1921. Nautilus, Vol. XXXV
Two Dall' papers in Nautilus 1921:
1) A new chiton form southern Brazil, Nautilus 35(1): 4-5 [26 july]
2) Nomenclatorial notes,  Nautilus 35(2): 49-50 [5 december]
>
>Chemnitz J.H., 1781.
Chemnitz J.H.,  Neues systematisches Conchylien-Cabinet
Nurnberg, 1780-1795
1781 may be vol. 2
>
>Leach, 1819
Leach W.E., 1819 - A list of invertebrate animals discovered by
 H.M.S. Isabella, in a voyage to the Arctic regions: corrected by
 W.E. Leach. Appendix II. [in] Ross J., A voyage of discovery
 [ ] in His Majesty's ships Isabella and Alexander (in 1818) for
 the purpose of exploring Baffin's bay and enquiring into the
possibility of a northwest passage. London, pp. XXXIX+252;
with 29 pl. and 3 maps.
 
 
>Lowe, 1826
May be:
Lowe R.T., 1827 - On Balanus punctatus, Puncturella flemingii
[ ] together with some corrections relative to Turbo carenus,
and some of the Chiton before described. Zool. Journ. 3:76-80.
>
>Smith, 1899
May be:
Smith E.A., 1899 - On some mollusca from Bering Sea, with
descriptions of two new species of Trochidae. Proc. Malac. Soc.
London, 3:205-207
>
>Thiele J., 1906
May be:
Bemerkungen  uber die Gattung Photinula. Nach. Deut. Malakozool.
Ges. 38:12-15
>
All the best
 
Riccardo Giannuzzi-Savelli