THE TYPES OF THE LAMARCK COLLECTION IN THE MUSEUM OF GENEVA 981 



Dimensions 



Length 



Width 



Height of 

 Aperture 



Lectotype No. 1108/18 (Fig. 41) 



19.7 



8.4 



9.0 



Paralectotype No. 1108/20 (Fig. 41 a)— var. B 



21.6 



8.4 



9.5 



Paralectotype No. 1108/21 (Fig. 41 b)— var. B 



21.6 



8.4 



9.6 



Lamarck's syntypes were mounted on an original de Lessert tablet, and the 

 séries contained 10 spécimens, which were a mixture of species. Seven spécimens 

 were M. harpifera Lamarck, two spécimens Pusia microzonias (Lamarck) and 1 

 spécimen Vexillum exasperatum (Gmelin). The spécimen figured by Kiener, has 

 been selected as the lectotype of M. harpifera, and the two spécimens representing 

 var. B of Mitra harpifera were selected as paralectotypes. The lectotype, which is 

 faded and worn, has 6 whorls and a missing protoconch; it is reddish-brown in 

 colour, ornamented with a distinct white spiral band on each whorl and another 

 faint, obsolète band towards the base of the body whorl; the ribs are lighter in 

 colour than their interstices. Sculpture consists of 20 slender and nodulose axial 

 ribs on the body whorl and 16 on the penultimate whorl; interstices have spiral 

 striae which override axial cords, and the siphonal fasciole is spirally corded. The 

 aperture is moderately narrow, lirate within, and the pariétal wall is calloused; the 

 columella has 4 brownish folds. 



The paralectotypes, which represent var. B of M. harpifera, are more dark 

 brown in colour, the whorls are more angulate, and the axial ribs fewer and wider 

 spaced. 



In 1822 Lamarck changed the name, for no apparent reason, to 

 M. harpaeformis, sl spelling which has been followed by subséquent authors. 

 Lamarck's species is a synonym of Vexillum ( Costellaria ) cruentatum (Gmelin, 

 1791), a species living in the Indo-West Pacific région. 



Mitra semifasciata Lamarck, 1811 

 (Fig. 42) 



1811. Mitra semifasciata Lamarck, Ann. Mus. d'Hist. Nat., 17:217, No. 60 

 1822. Mitra semifasciata Lamarck, Anim. s. vert., 7:319 

 1838. Mitra semifasciata Lamarck, Kiener, Spéc. gén. icon. coq. viv., p. 86, 

 pl. 26, fig. 81, 81 



L'Océan indien; mon cabinet; length 16-18 mm; mss. 4 ex. — Collection 

 Lamarck, Geneva: 12 spécimens. 



