THE TYPES OF THE LAMARCK COLLECTION IN THE MUSEUM OF GENEVA 989 



L'Océan des grandes Indes; mon cabinet; length 15mm; mss. 6 ex. — 

 Collection Lamarck, Geneva: 8 spécimens. 



There are 2 spécimens in excess of the 6 originally contai ned in the type-series. 

 The largest spécimen No. 1102/84: 13.8 x 6.2 x 6.5 mm, has been selected as the 

 lectotype of M. oniscina. The remaining 7 spécimens measure 13.7, 12.7, 12.6, 12.3, 

 1 1.9, 1 1.6 and 10.0 mm. The lectotype is worn and has 6 whorls and a worn brown 

 apex; it is ornamented with white and ashy-green spiral cords, the white colour 

 being prédominant on the first half of the body whorl and earlier whorls. Sculpture 

 consists of 15 broad axial ribs on the body whorl and 14 on the penultimate whorl; 

 interstices have prominent spiral cords which tend to bisect the axial ribs and 

 produce nodules at the point of intersection especially near the sutures; the siphonal 

 fasciole has 4 nodulose spiral cords. The aperture is narrow, lirate within, part of 

 the labial lip is broken ofï and the pariétal wall is calloused; the columella has 4 

 folds. 



Pusia oniscina (Lamarck) has been recorded from the Philippine-Indonesian 

 région. Mitra glandiformis (Reeve, 1845), is a synonym. 



Mitra tabanula Lamarck, 1811 

 (Fig. 54 a, 54 b) 



1811. Mitra tabanula Lamarck, Ann. Mus. d'Hist. Nat., 17:222, No. 79 

 1822. Mitra tabanula Lamarck, Anim. s. vert., 7:323 



L'Océan des grandes Indes; mon cabinet; length 13mm; mss. 3 ex. — 

 Collection Lamarck, Geneva: 6 spécimens. 



Among the spécimens extant in the collection, there is only one spécimen 

 approaching the dimension given by Lamarck. This spécimen No. 1102/85/1: 

 13.3x6.3x7.5 mm, has been selected as the lectotype of M. tabanula. (Fig. 54 a). 

 The other 5 spécimens have the following dimension: 12.4, 11.9 (Fig. 54 b), 11.8, 

 11.1 and 10.3 mm. The lectotype is worn and faded, and has 7 whorls and a worn 

 protoconch; it is uniformly orange-brown in colour. Sculpture consists of 15 

 elevated, slender spiral cords on the body whorl and 4 on the penultimate whorl; 

 sutures are indistinct and the interstices of the spiral cords are axially striate. The 

 aperture is narrow, brownish and smooth within, the labial lip is thickened and 

 crenulate and the columella has 4 folds. The body whorl near the pariétal wall is 

 holed in this position. 



Mitra tabanula is known from the East Indian Océan and the Western Pacific. 



Mitra pediculus Lamarck, 1811 

 (Fig. 55) 



1811. Mitra pediculus Lamarck, Ann. Mus. d'Hist. Nat., 17:222, No. 80 

 1822. Mitra pediculus Lamarck, Anim. s. vert., 7:323 



