6 ANTENOR, 
found in London clay, Calc-grossiér and green sand, Turin. A. 
glabrata, fig. 455. A. cinnamonea, fig. 456. 
ANCULO'SA. Say. Fam. Melaniens, Lam.  Ellipsostomata, 
Bl. A genus proposed to include some freshwater shells, re- 
sembling Melania; the only difference between them being, that 
the spire of Anculosa is more depressed, and the anterior of the 
outer lip more rounded, thanin Melania. Ez. fig. 314. 
AN’'CYLUS. Mill. Fam. Calyptraciens, Lam. Otides Bl. Deser. 
Thin, obliquely conical, patelliform; apex acute, turned poste- 
riorly; aperture oval, with simple margin. Obs. Although the 
little freshwater shells described under this name resemble Pa- 
tella, the animals which they enclose are nearly allied to Lymnza. 
A. Fluviatilis, fig. 246. 
ANDROM’EDES. Montf. Vorticialis, Lam. Fam. Nautilacea, 
Lam. A genus of microscopic Foraminifera. 
ANGULITES. Montf. Species of fossil Nautili, described by 
Blainville as not umbilicated, with a dorsal keel and angular 
aperture. Nautilus Triangularis, Buffon. 
ANGYOSTOMA. Bl. The third family of Siphonobranchiata, 
Bl. containing the genera, Strombus, Conus, Terebellum, Oliva, 
Ancilla, Mitra, Voluta, Marginella, Peribola, Cyprea, Ovulum. 
ANNELI'DES. Lam. The ninth class of “ Invertebrated ani- 
mals,’’ divided into three orders,viz. A. Apodes, A. Antennés, and 
A.Sedentaires. The last only contains testaceous mollusca. The 
animals are vermicular, some naked, others inhabiting shelly 
tubes. See Sedentary Annelides. 
AN’NULATED. (Annus,aring.) Composed of or surrounded 
by rings, as Tubicinella, fig. 14. 
AN’ODON. Lam. Fam. Submytilacea, Bl. Nayades,Lam. A 
genus composed of such species of Unio as are destitute of teeth 
onthe hinge. A. Cataractus, fig. 152. 
AN'OLAX. Brogn. AwnciaRia, Auct. 
ANOMALINA. D’Orb. A genus of microscopic Foraminifera. 
ANOMIA. Linn. Fam. Ostracea, Lam. and Bl. Deser. Irregu- 
lar, inzequivalve, sub-equilateral, thin, pearly, adhering to marine 
substances by means of a bony appendage, which forms an oper- 
culum toa large circular opening in the lower valve, near the 
hinge; muscular impression divided into three irregular portions; 
hinge destitute of teeth, with a short cartilage. Obs. The Lin- 
nen genus included not only the shells, to which our description 
would apply, but also various other genera, such as Crania, 
Orbicula, Terebratula, &c. which belong to the Brachiopoda, 
and are very distinct. Fig. 186, A. Ephippium. 
ANOS’TOMA. See Anastoma, 
ANSA’TES. Klein. Species of Patella, which have a produced 
recurved beak. Heucrion, Montf. Ex. Patella Pellucida, fig. 230. 
ANTEN’OR. Montf. A genus of microscopic Foraminifera. 
