10 



ANCILLARIA GLABRATA. Fig. 60 to 64. 



Swainson in Journ. of Sc. Lit. and Arts, XVIII., 285. 

 A. testd oblongd, aurantiaco-flavidd, spim acuminata ; anfractibus superne rotundato-angulatis, infra duabus lineis impressis 

 balteisque duobus instructo ; sulco supra varicem et sulco sinistrali varicis notabili in umbilicum superne juxta decur- 

 rentibus ; varice columellari obsolete striato ; labio externo prope basim unidentato ; aperturd supernk obtusd, coarc- 

 tatd, infra emarginatd ; labio columellari mediane coneavo ; long. 3, lat.\^, poll. 



Hab. in Oceano Indico. Mus. Goodall, nost., &c. 



Var. l ma . testa tota alba, sutura distincta, Mus. nost. 



Var. 2 da . testa tota nivea, balteis basalibus conjunctis. Mus. nost. 



Var. 3 tia . testa, aurantiaca, suturis distinctis. Mus. nost. 



Syn. Eburna glabrata, Lam. Anim. sans vert, VII., 280. Sowerby, Genera, No. 19. Eburna, f. 1. 



Buccinum gla'oratum, Linn. 



The Butter Whelk, Angl. 



L'lvoire, Gall. 



Hab. in Oceani Indici, littoribus. Mus. Brit. Goodall, Broderip, &c. 



This is the handsomest species of the genus, and at the same time one of the commonest ; it is, however, very seldom in 

 perfect condition ; having generally lost the lower edge of the outer lip and its tooth. It is of a brilliant orange-yellow colour, 

 darker at the edges and the upper part of the volutions ; upper part of the volutions with angles somewhat rounded ; with two 

 impressed transverse lines, and two belts above the columellar varix, and another deep groove on the left side of the varix itself, 

 run side by side into the deep umbilicus above. Columellar varix obsoletely striated ; outer lip with a single short tooth near the 

 base ; aperture obtuse and contracted at the upper end, half the length of the shell, notched at the base ; the line formed by the 

 columellar lip is concave or semilunar. 



I am disposed to yield my assent to the union of this species, together with A. balteata and A. nivea (which are Eburna? of 

 Lamarck) with the Ancillariae, because I think them sufficiently nearly related, and I am of opinion, moreover, that it is more 

 convenient to unite them with their congeners, forming a division of the genus for them, than to increase unnecessarily the number 

 of genera. 



