976 



W. O. CERNOHORSKY 



The aperture is moderately open, smooth within, the labial lip is thick and simple, 

 except for 5 blunt and small denticulations anteriorly; the columella is calloused 

 and has 4 folds. 



M. limbifera is a worn and faded example of the Indian Océan form of Mitra 

 ( Strigatella) scutulata (Gmelin, 1791). This " amphorella " form generally has a 

 broad light-coloured band at the sutres instead of the more usual white axial 

 fiâmes. The species is widely distributed throughout the tropical Indo-Pacific. 



Mitra aurantiaca Lamarck, 1811 

 (Fig. 33) 



1811. Mitra aurantiaca Lamarck, Ann. Mus. d'Hist. Nat., 17:214, No. 50 

 1822. Mitra aurantiaca Lamarck, Anim. s. vert., 7:316 (10 1/2 lig. = 23.1 mm) 

 Habite...; mon cabinet; length 21-22 mm; mss. 2 ex. — Collection Lamarck, 

 Geneva: 2 spécimens. 



Dimensions 



Length 



Width 



Height of 

 Aperture 



Lectotype No. 1102/72 (Fig. 33) 

 Paralectotype No. 1102/71 



20.4 

 23.4 



9.5 

 11.3 



12.4 

 13.3 



Both spécimens are présent in the collection and the smaller spécimen has been 

 designated as the lectotype of M. aurantiaca. The important diagnostic feature of a 

 crenulate labial lip mentioned by Lamarck, is not determinable from the paralecto- 

 type, which has a damaged labial lip. The lectotype is faded, and has 6 whorls and 

 a worn protoconch; it is orange-brown in colour, ornamented with a white band 

 on each whorl. Sculpture consists of ca. 15 prominent, rounded spiral cords on the 

 body whorl and 3 on the penultimate whorl; the cords become nodulose towards 

 the base. The aperture is narrow, smooth within, the labial lip is thick and 

 crenulate, and the columella has 4 folds. 



Mitra aurantiaca is a synonym of M. aurantia (Gmelin, 1791). Gmelin's taxon 

 should replace M. crassa Swainson, 1822, which was based on less faded, better 

 preserved spécimens which may have appeared distinct as a species. M. aurantia is 

 widely distributed in the tropical Indo-Pacific région, but does not occur in New 

 Zealand as Kiener indicatcd. 



Mitra amphorella Lamarck, 1811 

 (Fig. 34) 



181 1. Mitra amphorella Lamarck, Ann. Mus. d'Hist. Nat., 17:214 No. 51 

 1X22. Mitra amphorella Lamarck, Anim. s. vert., 7:316 



