66 ANCULOSA. 



A. rostrata. The Anatinae are found in the East Indies and 

 South Sea Islands. 



ANATINELLA. G. B. Sowerby. (Dimunition of Anatina). A 

 genus so named from its resemblance to Anatina, from which it 

 differs in being destitute of the internal appendage, and having 

 no sinus in the palleal impression. One species having been 

 brought from Ceylon, received the name of Anatinella Sibbaldii. 

 Another has lately been found in the Philippine Islands. Fig. 70. 



ANATOMUS. Montf. Tom. 2, plate 279. A microscopic shell, 

 appearing from the figure to resemble Scissurella. 



ANAULAX. Brogn. Ancillaria, Auct. 



ANCILLA. Lam. Ancillaria, Auct. 



ANCILLARIA. Auct. Ancilla, Lam. {A handmaid.) Fam. 

 convolutce, Lam. Angyostomata, Bl. — Descr. Smooth, oblong, 

 subcylindrical. Spire short, sutures hidden by enamel. Aper- 

 ture long, anteriorly emarginated and somewhat effuse. Colu- 

 mella tortuous, oblique, tumid, truncated. — Obs. The Ancillarise 

 are pretty shining shells, enveloped almost entirely by the soft 

 parts of the animal. They resemble Oliva, from which they are 

 distinguished by the suture of the spire being filled up with shelly 

 enamel, nearly covering the surface. The whorls in Oliva being 

 separated by a distinct canal. Ancillaria may be known from 

 Terebellum by the tumid varix at the base of the columella. 

 The well known Ivory shell, Eburna glabrata, Lam. belongs to 

 this genus, of which a few fossil species are found in the London 

 clay, Calcaire grossier and green sand, Turin. The recent species 

 are found in the Islands of the Indian Ocean and Australian 

 Seas. A. glabrata is represented in the plates fig. 455 ; A. cin- 

 namonea, fig. 456. 



ANCULOSA. Say. Fam. Melaniana, Lam. Ellipsostomata, Bl. 

 A genus proposed to include some fresh-water shells resembling 

 those of the genus Melania, the difference between them being 

 that the spire of Anculosa is more depressed, and the anterior of 

 the outer lip more angulated than in Melania. On an examina- 

 tion of the different species, however, it will be found that this 

 is quite unsatisfactory, as a generic distinction ; because some of 



