1878.] FROM THE ANDAMAN ISLANDS. 815 



47. Mitra (Callithea) obeliscus, Reeve, Conch. Icon. ii. 

 fig. 107. 



A small specimen, not quite adult, from the Andaman Islands, 

 agrees with those from the Philippines in all respects, but has the 

 second white band below the middle of the body-whorl more con- 

 spicuous than usual. 



48. Mitra (Costellaria) exasperata, Chemnitz ; Reeve, 

 Conch. Icon. fig. 162. 



M. torulosa, Lamk., Kiener, Coq. Viv. pi. 25. fig. 77. 

 Hab. Java ; Philippines. 



49. Mitra (Costellaria) deshayesii, Reeve, Conch. Icon, 

 fig. 170. 



Hab. New Caledonia (Mus. Cuming). 



Capt. Wilmer tells me that the orange-scarlet markings on this 

 pretty species fade considerably after death. One of the specimens 

 he collected is 25 millims. long. The mouth is purplish black 

 within, with a single white zone ; and the lip is white within at the 

 margin. 



50. Ranella ptjsilla, Broderip, P. Z. S. 1832, p. 194; Sowerby, 

 Conchol. Illustr. fig. 1*, fig. la, var.; Reeve, Conch. Icon. ii. figs. 44 

 a, b (both varieties). (Plate L. fig. 15). 



Triton laciniatum, Mighels, fide Pease, Amer. Journ. Conch, iv. 

 p. 107. 



Var. =22. rosea, Reeve, I. c. fig. 46. 



Var. =Bursa concinna, Dkr. P. Z. S. 1862, p. 239. 



Hab. Lord Hcod's Island and Philippine Islands ; Red Sea. 



R. rosea, Reeve, and concinna, Dkr., which I consider varieties 

 of this species, are distinguished from the normal form almost solely 

 on account of a difference in colour. If this were tenable, the Anda- 

 man shell would constitute a third species ; for it certainly varies in 

 this respect either from R. pusil/a, concinna, or rosea. The 

 principal colour is reddish brown ; the lowermost series of granules on 

 the upper whorls, the fourth and fifth series from the top of the 

 body-whorl, and the second rib from the suture on each varix, on all 

 the whorls, are yellow. The columella is purple, with three or four 

 transverse whitish nodules, and within the outer lip near its edge there 

 are about eight white bead-like granules on a dark-purple ground. 

 The interior of the aperture is purple-brown, with the exterior yellow 

 zone visible. 



The normal form of the species described by Broderip is white in 

 every part. In the Museum series of nearly 40 specimens there are 

 various intermediate and connecting gradations between this and the 

 pink form (rosea) or the brown variety (concinna). In fact, 

 the differences are so subtle, that I feel it impossible to draw a line 

 of distinction any where between these varieties. The difference in 

 specimens apparently adult is very striking. The largest example of 



