954 



W. O. CERNOHORSKY 



originally purchased from the Lamarck estate by an unknown English buyer. The 

 new owner prepared an interleaved, handwritten English title, and summarized the 

 described taxa which yielded 38 gênera, 1413 species, 4185 spécimens and 407 

 non-descript species. This copy, subsequently purchased by B. de Lessert, bears 

 Rosalie de Lamarck's annotations in black ink on the left hand margin. Thèse 

 marginal notes indicate the number of spécimens présent in her father's collection 

 and sometimes taxonomic annotations. Undocumented spécimens from the other 

 collections have sometimes been added to Lamarck's syntype séries, and R. de 

 Lamarck's marginal annotations are a useful guide in the ségrégation of Lamarck's 

 types. 



The Sélection of Types 



Lamarck's monograph on the family Mitridae appeared in the Annales du 

 Muséum d'Histoire Naturelle Paris (1811). No holotype désignations were made 

 by the author in this work, but the dimension for a single spécimen was given in 

 " mm", or a size range was indicated in the case where a description was based on 

 several spécimens. The Mitridae were re-described in the seventh volume of the 

 " Animaux sans vertèbres " (1822), where only a few species were added, others 

 synonymized, and some described in the genus Columbella and Cancellaria. In this 

 particular work, the measurement for a given spécimen or spécimens was expressed 

 in pouces (27.0 mm) or lignes (2.25 mm). Thèse measurements generally compare 

 fairly well with the dimensions cited in 1811. 



Provided that a described species is based on a single spécimen, and is indicated 

 in a mss. note by R. de Lamarck at the margin, this spécimen is considered to be 

 the holotype. Lamarck did not select a " type " or use an équivalent expression nor 

 set aside a spécimen to represent the species he described. Under article 73(c) of the 

 International Code of Zoological Nomenclature (1964), ail spécimens of the type- 

 series are of equal rank, and a lectotype has to be selected. Every attempt has been 

 made to designate as lectotype the single spécimen for which Lamarck provided a 

 measurement, or which has been illustrated in the " Tableau Encyclopédique et 

 Méthodique " (1798). Several of Lamarck's types were also illustrated by Kiener 

 (1838). 



Lamarck's descriptions of new species of Mitridae were based on spécimens 

 from his private collection and also from the Muséum collection of the Muséum 

 d'Histoire Naturelle in Paris (see Appendix). The latter types are in the Paris 

 Muséum, but it appears that some of thèse types can no longer be traced. 



In the account which follows, the species séquence is not alphabetical, but is 

 arranged in the same order as the species appeared in the rirst mitrid monograph of 

 1811, and are numbered from 1 to 80. Lamarck's original locality and dimension 

 indication arc cited, and R. de Lamarck's mss. notes on the number of spécimens 

 extanl m the Lamarck collection arc appended. Species described prior to Lamarck 



