78 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



in 1796, returning in 1798. R. Mauge was tlie zoologist and Le Dru 

 botanist. The collections they brought back were deposited in 

 the National Museum, but owing to Mange's decease and other 

 causes were not worked out (Gass. & Fisch., p. 199). Notes con- 

 cerning them were published in Le Dru's account of the voyage in 

 1810, to be cited later. 



1800. Cuvier instituted the name Testacella, which appears, 

 without any definition or description whatever, on Table V of his 

 " Le9ons d' Anatomic Comparee ", tom. i. 



1801, January. Lamarck, Avho had evidently become acquainted 

 with Mauge's specimen (or specimens) from Teneriffe, preserved in 

 the Natural History Museum at Paris, accepted the name Testacella, 

 and gave a description of the genus, citing after the custom of the 

 time the nearest figures, which were those of Favanne, and giving 

 as examples (Syst. Anim. s. Vert., p. 96) : " Testacella haliotoides. n. 

 ex D. Mauger [sic] ex ins. Teneriffse." 



Since " a genus proposed with a single original species takes that 

 species as its type " (Internat. Rules Zool. Nomencl. Monaco, 1913, 

 Art. 30, I, c), and in such cases the generic description obviously 

 covers the species and is rightly held to do so (opinion 43), 

 Lamarck's name, which is correctly formed, cannot be set aside 

 as a nomen nudum, but must hold for the sole species of Teneriffe, 

 afterwards renamed by Ferussac Testacella maugei. 



About this time a M. Faure-Biguet rediscovered the genus in 

 France, and supplied Draparnaud and Cuvier with specimens, as 

 stated by the latter in his paper presently to be referred to. 



1801, July. So that in his "Table des Mollusques terrestres et 

 fluviatiles de la France ", which appeared in July, 1801, Draparnaud 

 was able to include the form under the generic name of Testacella, 

 adding in a note (p. 99) : " II faut rapporter au genre Testacelle, 

 les limaces a coquille de Favanne . . . qui sont toutes 

 exotiques, et de I'ile Tenerifie, selon Mauger [sicy Apparently 

 unacquainted with Lamarck's work, but similarly struck by the 

 resemblance of the shell to that of Haliotis, he bestowed on the 

 species the philologically incorrect name of haliotidea. His name, 

 therefore, being a homonym of Lamarck's, cannot stand, although 

 it has so long been in use. 



1802. Early in the year Bosc, who was evidently unacquainted 

 with Draparnaud's work, gave in his " Histoire Naturelle des 

 Coquilles" (suites a Buffon classe par Castel), tom. iii, p. 240 (under 

 Testacella, Lamarck) T. haliotoides, from Teneriffe, T. costata, from 

 the Maldives, and T. cornina, locality unknown. 



1802, March. Faure-Biguet published a note, " Sur une nouvelle 

 espece de Testacelle " (Bull. Sci. Soc. Philom. Paris, An x, p. 98, 

 pi. V, f. [2] a-d), describing and figuring the form named T. 

 haliotidea by Draparnaud, but himself giving no name of any sort, 

 nor locality. 



