22 AMERICAN JOURNAL 



Mr. Sowerby has also selected a West Indian species from the 

 Cumingian Coll, to represent the above in Thes. Con. 

 The Australian I describe as 



COLUMBELLA MACULOSA, Pse. 



T. elongato-ovata, Isevis, nitida ; anfr. 6, piano convexis, ad 

 suturam marginatis, ultimo basin sulcato, recurvo ; apertura 

 parviuscula ; columella tridentata ; lineis flavescentis reticulata. 



Anfr. infra suturam, fascia purpurascento cingulatis, et albo 

 maculatis, supra suturam, albo, et flavescente alternatim macu- 

 latis. 



Long. 7, diam. 3| mill. 



Shell elongately ovate, smooth, shining ; whorls six, flatly 

 convex, marginate at the suture, the last grooved at base and 

 recurved ; aperture rather small ; columella tridentate ; openly 

 reticulate with fine yellowish lines, with an irregular band of 

 same color encircling the last whorl ; whorls encircled above 

 next the suture with a purplish band, which is spotted with 

 opaque white, and below next the suture, with a line of alternate 

 white and yellowish spots. The last whorl is usually partly en- 

 circled on its base with a purplish line or narrow band. 



Operculatum indicum, Gme. 



This species is credited to Australia by Mr. Angas, who gives 

 it a wide range in other provinces. 



The only species, so far as I am aware, inhabiting Polynesia is 

 0. aurantium, Pse. 



Judging from a single specimen in my collection of the shell 

 of the Australian species, and the color of the animal as given 

 by Mr. Angas, viz., "greenish yellow," it is possible that when 

 the animal is closely examined, it may prove to be distinct from 

 the East Indian. 



Marginella debilis, Pse. 



M. oryza, Pse. Proc. Zool. Soc, 1860. p. 147. 



Name preoccupied, changed as above. 



Mr. Redfield, in his monograph of the above genus, published 

 in this Journal, 1870, has classed the above as a synonym of M. 

 australis, Hds. 



A mistake must have occurred as to the identity of the species, 

 as the two are widely distinct. M. australis is described as 

 having the outer lip smooth within and the shell smooth and 

 colored. The lip of M. debilis is dentate, the shell striate, white, 

 and I would add to the description, marginate at the suture. 



The two species also differ in size and shape. 



