118 AMERICAN JOURNAL 



183*2. Purpura sertum, Blain., Nouv. Ann. du Mus. vol. i, p. 258. 



" " Francolinus, Blain., " " " 



1835. " " Kien., Coq.Viv., p. 135, pi. 42, f. 97. 



" " sertum, Kien., " " p. 133, pi. 41. 



1844. " " Lam., An. sans Vert. vol. x, p. 77. 



" " Francolinus, Lam., " " " 



1846. Buccinum " Rve., Conch. Icon. sp. 41. 



" " sertum, Rve., " " sp. 42. 



« " situla, Rve., " " sp. 40. 



1856. " sertum, Wood, Ind. Test. pi. 23, fig. 65. 



The examination of an extensive series of the above species, 

 from various localities, extending from the Red Sea to the Pau- 

 motus, leaves no doubt but that the several species enumerated 

 above are synonymous. This species appears to have been first 

 noticed by Seba. An immature specimen was figured by Lister 

 and copied by Klein. Martini attached to it the name of B. 

 sertum hederacea. As sertum was adopted by Bruguere, La- 

 marck and others, we retain it, otherwise coronatum, Gin., has 

 precedence. The variation chiefly consists in being more or less 

 strongly striate transversely, and less frequently longitudinally, 

 the latter rendering the surface somewhat granulose. Neither 

 the variation in color, nor that of size or shape, as shown by the 

 figures of Kiener and Reeve, are constant in any one of the va- 

 rieties. The darkest specimens are, however, the smoothest. 

 Traces at least of transverse striae can be always detected. The 

 variety described by Mr. Reeve as situla occurs also at the Ha- 

 waiian Islands and other localities. The dark variety figured by 

 Kiener as Francolinus is found at the Paumotus, of diminutive 

 size (one inch in length), on which the edge of outer lip and co- 

 lumella are black. 



A variety as to color and markings inhabits central Polynesia, 

 which has not yet had the opportunity of being named. It is 

 ornamented transversely, with angular lines of a light purplish 

 or cinereous color, disposed sometimes in bands. Should all the 

 names be retained, those most coarsely striated would be J. ser- 

 tum, those moderately so, Francolinus, and the smoothest, situla, 

 Reeve. 



Turbinella gemmata, Rouss. non Rve., Voy, au Pol. Sud. p. 

 112, pi. 25, fig. 23, 24. 



The above species is certainly not " gemmata, Rve., but pro- 

 bably incarnata, Desh. I hesitate to connect it, however, with 

 that species, as all specimens I have seen, however much weath- 

 ered, preserve the color of the aperture. 



