498 COLLECTIONS FROM THE WESTERN INDIAN OCEAN. 



47. Harpa minor, Laniard: 

 Darros Island, on the shore. 



48. Mitra episcopalis, Linne. 



Mozambique 



49. Mitra coronata, Chemnitz. 



Darros Island, in 22 fms. 



50. Mitra luctuosa. 

 A. Adams ; Sotcerby, Thesaurus Conch, vol. iv. fig. 229. 



Darros Island, in 22 fms. 



This species is of a dark olive-brown colour, having a single 

 yellow line around the upper part of the whorls. It is spirally 

 punctate-striate throughout, consists of ten whorls, and has five 

 plaits on the columella, of which the lowermost is insignificant. 



51 . Mitra tenuis. (Plate XLIY. fig. jS t .) 

 Sotcerby, Thesaurus, vol. iv. p. 0, fig. 327. 



Seychelles, in 4-12 fms. 



The locality of this species has hitherto been unrecorded. It is a 

 thin, narrow shell, of a light yellowish-brown colour, having a pale 

 zone at the upper part of the whorls, another around the middle of 

 the last, and a third less distinct one towards the base. "Whorls 10; 

 five apical excentric, smooth, convex, pale, the rest normal, almost 

 flat at the sides, separated by an oblique suture, sculptured through- 

 out with spiral striae and lines of growth. The aperture is very 

 much narrowed above and widens considerably below. The colu- 

 mella is oblique and armed with four plaits. Length 12^-millim., 

 diameter 34, aperture 5-i- long. 



Sowerby's figure of the type, now in the British Museum, is con- 

 siderably enlarged, and represents the aperture a little too long in 

 proportion to the spire, and only two plaits on the columella are 

 indicated, whilst no mention whatever is made of this character in 

 the text. The "light fulvous band" is not at the upper part of 

 the whorls as stated, this portion being pale and the band falling 

 lower down. 



52. Turricula (Callithea) exasperata, Chemnitz. 

 Seychelles, 4-12 fms. 



53. Turricula (Callithea) mucronata. 



Mitra mucronata, Swainson; Reeve, Conch. Icon. fig. 125; Sowerby, 



Thcs. Conch, fig. 37! >. 

 Mitra echinata, A. Adams, Proc. Zool. Soc. 18-jO, p. 138. 



Cerf Island, Mascarenes, in 1<> fms. 



