Helix by its oval form ; it forms part of the genus Helix of De 

 Ferrusac, under the sub-generic designation of Cochlostyla. It 

 is known from Achatina by the absence of the notch at the point 

 of union between the inner and the outer lips. The young are 

 produced from eggs, which are as firm and opaque as those of 

 birds. (See Introduction.) Bulinus rosaceus, fig. 282. B. Guada- 

 loupensis, fig. 283. B. Lionetianus, fig. 284. B. lubricus, fig. 

 285 . Many new species were brought to this country by Mr. 

 Cuming, and are represented in the Conchological Illustrations, 

 published by the Author at 50, Great Russell Street, Bloomsbury, 

 (in parts 21,22,23,26,27, 30,31,34,35, 137 to 146, 185, 186.) 

 Species occur in Europe, West Indies, Brazil, and South America 

 generally. Some small species are British. 



BULLA. Auct. Fam. " Bulleens," Lam. Akera, Bl.— Descr. Gene- 

 rally thin ; smooth, oval, oblong or cylindrical, more or less convo- 

 lute ; spire short, depressed, or hidden by the last whorl ; aperture 

 long, wide in front, gradually narrowing towards the spire ; outer 

 lip thin ; inner lip spread over a part of the last whorl. — Obs. 

 The shells composing this genus are very variable in form. The 

 light horny species with an elastic lip is called Akera, fig. 247. 

 The more decidedly convolute species with hidden spires are the 

 Atys, Mcntf. B. Naucum, fig. 250. B. Lignaria, fig. 251, is Sca- 

 phander of Leach. The light, thin species, with extremely wide 

 aperture, fig. 248, is Bullsea aj.erta, Lam. The genus Bullinula of 

 Dr. Beck, consists of those species which have more produced 

 spines, fig. 253. The Bullae are marine, and inhabit all climates. 

 The fossil species occur in tertiary beds. 



BULLiEA. Lam. Bulla aperta, Auct. fig. 248. 



BULL2EANA. (" Bulleens, Lam,") A family belonging to the first 

 section of Lamarck's order, Gasteropoda, containing the genus 

 Bulla The genera Bullaaa, Akera, Aplustra, Atys, Scaphander, 

 Bullinula, into which it has been divided, may all be fairly included 

 under the name Bulla. 



BULLIA. Gray. A genus of shells partly resembling Buccinum, 

 and Terebra in general form, being more elongated than the 

 former and more ventricose than the latter. Mr. Gray remarks 



