MAEGINELLA. ],95 



lated, with an angle and slight sinuosity above ; the inner lip is 



. more or less granulated or denticulated. Ex. M. Citharella, 



- Leach. This was the first species known, and it was placed by 



' Lamarck among the CancellariaB, to which it has little afiinity. 

 M. Eeeve's Monograph contains about 70 species, the great 

 majority of which were brought new from the Philippines by 

 Mr. Cuming. Mangelia Coronata, Hirids. PI. xxviii. fig. 

 597. 



MAEGrAHITA. Leach. {Margarita, a pearl.) A genus of small 

 shells resembling the genus Trochus, from which it differs in 

 having an operculum consisting of few whorls. M. taeniata, fig. 

 862. Mr. Gr. B. Sowerby, sen. has enumerated 15 species in a 

 list aceonipanying the figures published by the author of this 

 manual in Nos. 132 to 134 of hia Conchological Illustrations. 



MAEGAEITACEA. Bl. The third family of Lamellibranchiata, 

 Bl. The shells belonging to it are described as irregular, in- 

 equivalve, inequilateral, black or horny without, pearly within ; 

 hinge auriculated, scarcely developed, and without teeth. The 

 ligament is variable and there is a large sub-central muscular 

 impression. This family contains the genera Vulsella, Malleus, 

 Pinna, Crenatula, Inoceramus, Catillus, Pulvinites, GrerviUia 



. and Avicula. 



MABGAEITACEOUS. {Margarita, a pearl.) Pearly. 



MAEGAEITANA. Schum. 1817. Alasmodonta. Say, 1840'. 

 A sub-genus of Uniones, composed of species having " one car- 

 dinal tooth," and no. lateral teeth. iSij?. M. Complananta, fig. 

 141. 



MAEGAEITIFEEOUS. {Margarita, -^eaA; /ero, - to bear.) 

 Pearl-bearing. Applied to shells which form pearls ; as Melea- 

 grina Margaritifera, or Pearl-bearing. Oyster. 



MAEG-INAL. Near the margin or edge. : 



MAEG-INATED. {Margo, edge.) Having an edge or border 

 thicker than the rest of the shell, from which circumstance the 



. little genua Marginella derives its name. 



MAEGrlNELLA. Lamarck, 1801. Pokoellaka. Adansou, 

 1757. (A little rim or border.) Fam. Coluraellaria, Lam. 



