THE TYPES OF THE LAMARCK COLLECTION IN THE MUSEUM OF GENEVA 975 



1822. Mitra conuhis Lamarck, Anim. s. vert., 7:316 



1838. Mitra conulus Lamarck, Kiener, Spéc. gén. icon. coq. viv., p. 109, 

 pl. 34, fig. 111, 111 



Habite...; mon cabinet; length 32mm; mss. 1 ex. — Collection Lamarck, 

 Geneva: 3 spécimens. 



Lamarck's holotype No. 1102/70/1: 31.8 x 15.6 x 24.7 mm, is extant in the 

 collection; it has been figured in the Encycl. Méth., and by Kiener. The holotype 

 has 5 adult and 3 nuclear whorls; it is brownish in colour with protruding white 

 areas and coffe-brown spiral lines. Sculpture consists of ca. 13 spiral grooves on 

 the ultimate half of the body whorl, a presutural spiral groove, and a triple row 

 of prominent beads on earlier whorls. The aperture is long and narrow, white and 

 smooth within; on the pariétal wall, at the juncture of the aperture is a small 

 callosity. The columella has 6 ledge-like folds, and the siphonal fasciole is prominen- 

 tly calloused. 



Lamarck's M. conulus is a synonym of Pterygia conus (Gmelin, 1791). The 

 species is uncommon, and has a restricted distribution in the Philippine-Indonesian 

 région and the Western Pacific. 



Mitra limbifera Lamarck, 1811 

 (Fig. 32) 



1811. Mitra limbifera Lamarck, Ann. Mus. d'Hist. Nat, 17:214, No. 49 

 1822. Mitra limbifera Lamarck, Anim. s. vert., 7:316 



1838. Mitra limbifera Lamarck, Kiener, Spéc. gén. icon. coq. viv., p. 56, 

 pl. 17, figs. 54, 54 



Habite...; length 38 mm; Collection Lamarck, Geneva: 1 spécimen. 



In his original description, Lamarck omitted to mention the location of the 

 type of the described species, but in 1822 he listed the spécimen as originating from 

 the Muséum collection (Muséum d'Histoire Naturelle, Paris). Rosalie de Lamarck 

 did not make an entry next to M. limbifera, which would signify that no spécimen 

 of the species was in her father's collection. 



The spécimen présent in the Lamarck collection in Geneva, No. 1108/11: 

 38.4 x 16.2 x 18.4 mm, corresponds very closely to Lamarck's description and size, 

 and could possibly be the type. It is the spécimen figured by Kiener for M. limbi- 

 fera from the Muséum or Massena collection. It is presumed that the type 

 somehow found its way into Lamarck's personal collection. 



The presumable holotype is a somewhat worn and faded shell with 6 whorls 

 and a worn protoconch; the body whorl has a broad white band at the suture, 

 while the lower two-thirds is orange-brown ; only a narrow orange-brown band at 

 the sutures is visible on earlier whorls. Sculpture consists of only a few spiral 

 striae at the suture of the body whorl and ca. 10 nodulose spiral cords at the base. 



