ALATUS. 61 



^GrLIA. Say. A division of " Uniouidse," described as having 

 the " shell cuneate ; bosses prominent ; cardinal teeth much 

 compressed, placed on one side of the bosses, ^glia ovata, 

 Say. Occidens Lea. Am. Tr. iii. pi. 10." Lardner's Encyclo- 

 pedia of Malacology. 



AG-ANIDES. Montf. Oebulites. Lam. PI. xxiii. f. 479*. 



AGAEOMA. G-ray, 1839. A genus of shells, of which Yoluta 

 hiatida is the type. 



AOATHIESES. Montf. Siliquaeta, Auct. 



AGINA. Tvu-ton, 1822. Corbula, Brug. 1792. 



AKEEA. Bl. The fourth family of the order Monopleurobran- 

 chiata, Bl. containing the genera Bulla, Bullsea and Bellero- 

 phon, which, excepting the last, constitutes the family Bullseana, 

 Lam, 



AKEEA. Miiller. A genus of extremely light horny sheUs, 

 belonging to the family of BuUidse. Six species are described 

 in Mr. Adams' Monograph, No. 11. Sowerby's Thesaurus. 

 Ex. BuUa Hanleyi, f. 247. 



ALtEA. Jeffreys. A genus of minute land shells, resembling 

 Vertigo, but separated because they are dextral, while Vertigo 

 is sinistral. A. marginata, Pupa marginata, Drap. found in 

 marshy ground, roots of trees, moss, &c. Britain and Southern 

 and Central Europe. PI. xiv. f. 292. 



ALASMODON. Say. Masgaeitum. Ex. A. complanatus, pi. 

 vii. fig. 141. Schum. 



ALAT^. Lam. A family of the order Trachelipoda, Lam. con- 

 taining the following genera, which may be thus distinguished : 



1. EosTELiiAEiA. Sinus close to the canal ; including Hip- 



pochrenes, and Aporrhais. Eig. 402 to 404. 



2. Steombus. Sinus not close to the canal. Fig. 406. 



3. Pteeoceeas. Same, digitated. Eig. 405. 

 ALATED. (From Ala, a wing.) "Winged, a term applied to shells 



when any portion of them is spread out in any direction, as in 

 fig. 403. Hippochrenes, Montf. and fig. 147, Unio Alatus. 

 ALATUS. Humphrey, Steombus, Auct. 



