ANCULOTUS, 67 



genus Lyonsia. The genus JSTseara, Gray, is composed of Anatina 

 longirostrum, and similar species, whicbi have not the bony- 

 appendage, while the spoon-shaped prominence is small, and only- 

 found in one valve. Mya is distinguished from Anatina, by the 

 thickness of the shell, and also by having the prominence only 

 in the hinge of one valve. PL iii. fig. 69. . 



ANATINELLA. G. B. Sowerby. (1835.) (Diminution of ^wa^wm.) 

 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, Ex. Anatinella Sibbaldii, 

 fig. 70. 



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

 appearing, from the figure, to resemble Scissukella. 



ANAULAX. Eoissy? Ancilla, Lamarck. 



ANCILLA. Lam. (1801.) ANCILLAEIA. Lam. (1822.) {A 



. handmaid.) Fam. convolutse, Lam. Ajigyostomata, Bl. — Descr. 

 Smooth, oblong, subcylindrical. Spire short, sutures hidden by 

 enamel. Aperture long, anteriorly emarginated and somewhat 

 effuse. Columella tortuous, oblique, tumid, truncated. — Obs. 

 The Ancillarise are pretty shiuing sbells, enveloped almost 

 entirely by tbe soft parts of the animal. They resemble Oliva, 

 from which tbey are distinguished by the suture of the spire 

 being filled up -mtb shelly enamel, nearly covering the surface. 

 The whorls in Oliva being separated by a distinct canal. 

 Ancillaria may be kno-wn from Terebellum by the tumid varix 

 at the base of the columella. The well known Ivory shell, 

 Eburna glabrata. Lam. must retain its name, and be removed, 

 with several congeners from this genus. The recent species are 

 found in the Islands of the Indian Ocean and Australian Seas. 

 Eburna glabrata is represented in the plates fig. 455 ; Ancillaria 

 cinnamonea, fig. 456. 



ANCTJLOTUS. Say, 1825. Fam. Melaniana, Lam. EUipsostomata, 

 Bl. A genus proposed to include some fresh- water shells resem- 

 bling those of the genus Melania, tbe differences between them 

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

 anterior of the outer lip more angulated than in Melania. On 



r2 



