986 



W. O. CERN0H3RSKY 



Mitra bacillum will have to replace M. philippinarwn A. Adams, 1853; the 

 species is rather common, and inhabits localities throughout the tropical Indo- 

 Pacific. 



Mitra peronii Lamarck, 1811 

 (Fig. 49) 



1811. Mitra peronii Lamarck, Ann. Mus. d'Hist. Nat., 17:220, No. 71 

 1822. Mitra peronii Lamarck, Anim. s. vert., 7:322 



1838. Mitra peronii Lamarck, Kiener, Spéc. gén. icon. coq. viv., p. 58, pl. 18, 

 fig. 58, 58 



L'Océan austral ou des grandes Indes. Péron; mon cabinet (1822); length 26 

 ou 27 mm; Collection Lamarck, Geneva: 1 spécimen. 



The extant spécimen is the one figured by Kiener, and is here designated as the 

 lectotype of Mitra peronii. Lamarck had at least 2 spécimens, since a dimension for 

 a smaller spécimen was given in 1822 (9% lig. =21.9 mm); the smaller spécimen 

 could not be traced. The lectotype has 7 whorls and a worn protoconch; it is 

 brownish in colour, ornamented with a prominent white spiral band on each 

 whorl. Sculpture consists of ca. 20 spiral cords on the body whorl and 4 on the 

 penultimate whorl; interstices are axially grooved. The aperture is narrow, smooth 

 and brownish within, the labial lip is thick and crenulate and the columella has 4 

 folds. 



Mitra peronii is a synonym of M. aurantia (Gmelin, 1791), a species which is 

 widely distributed throughout the tropical Indo-Pacific. 



Mitra limacina Lamarck, 1811 



1811. Mitra peronii var. B, M. limacina Lamarck, Ann. Mus. d'Hist. Nat., 

 17:220, No. 71 



The variety M. limacina is a shorter, smaller form of M. peronii according to 

 Lamarck's description. The type of this variety could not be traced. 



Mitra pisolina Lamarck, 1811 

 (Fig. 50) 



1811. Mitra pisolina Lamarck, Ann. Mus. d'Hist. Nat., 17:221, No. 75 

 1822. Mitra pisolina Lamarck, Anim. s. vert., 7:322 (5% lig.-- 12.9 mm) 

 L'Océan indien ; mon cabinet (1822); length 14-16 mm; mss. 3 ex. — Collection 

 Lamarck, Geneva: 5 spécimens. 



The 5 spécimens extant in the collection are mounted on a de Lessert tablet. 

 Nfone of thèse spécimens attain a size of 14-16 mm as given by Lamarck in 1811, 

 but one spécimen measures 12.7 mm Lia length, and corresponds not only to 

 Lamarck's diagnosis but also to the indicated length of 12.9 mm given in 1822. 



