Report on the zoological collections made in the Indo-Pacific Ocean ...

;498 COLLECTIOKS FROM THE WESTERN INDIAN OCEAN.Darros Island, on the shore,47. Harpa minor, Lamarcl-.48. Mitra episcopalis, Linne.Mozambique.49. Mitra coronata, Chemnitz.Darros Island, in 22 fms.50. Mitra luctuosa.A. Adams ; So^cerby, Thesaurus Conch, vol. iv. Cg. 229.Darros Island, in 22 fms.This species is of a dark olive-brown colour, having a singleyellow line around the upper part of the whorls. It is spirallypunctate-striate throughout, consists of ten whorls, and has fiveplaits on the columella, of which the lowermost is insignificant.51 . Mitra tenuis. (Plate XLIV. fig. K.)Sowerby, Thesaurus., vol. iv. p. 6, fig. 327.Seychelles, in 4-12 fms.The locality of this species has hitherto been unrecorded.It is athin, narrow shell, of a light yellowish-brown colour, having a palezone at the upper part of the whorls, another around the middle ofthe last, and a third less distinct one towards the base. Whorls 10five apical escentric, smooth, convex, pale, the rest normal, almostflat at the sides, separated by an oblique suture, sculj)tured throughoutwith spiral striae and lines of growth. The aperture is verymuch narrowed above and widens considerably below. The columellais oblique and armed with four plaits. Length 12imillim.,diameter 3^, aperture 5^ long.Sowerby's figure of the type, now in the British Museum, is considerablyenlarged, and represents the aperture a little too long inproportion to the spire, and only two plaits on the columella areindicated, whilst no mention whatever is made of this character inthe text. The " light fulvous band " is not at the upper part ofthe whorls as stated, this portion being pale and the baud fallinglowerdown.52. Turricnla (Callithea) exasperata, Chemnitz.Seychelles, 4-12 fms.53. Turricula (Callithea) mucronata.]\Jitra mucronata, Swainson; Reeve, Conch. Icon. fig. 125; Sowerby,Thes. Conch, tig. 379.Mitra echinata, A. Adams, Proc. Zool. Soc. 1850, p. 138.Cerf Island, Mascarenes, in 10 fms.