A V I C U L A. 



Species 3. (Mus. Brit.) 



Avu'iJLA LOTORIUM. Avic. iestd longitudmaliter obhngd, 

 obliqud, solirlimcula, ampliter gibbosa, margaritiferd, 

 cupre.o-rufd, extus fusco-nigrd, corned, decmmtim stri- 

 ata, ■nipenie obtuse alatd. 



The bath Avicula. Shell longitudinally oblong, ob- 

 lique, rather solid, largely gibbous, pearly, coppery- 

 red, externally brown-black, horny, decussately stri- 

 ated, obtusely winged at the upper part. 



Lamarck, Anim. sans vert. vol. vii. p. 97. 



Lavacrum cupreum, Chemnitz 

 Hoi. ? 



M. Deshaycs regards this species as a variety of A. ma- 

 crop/ern, with the anterior wing not produced. We en- 

 tirely coincide with Lamarck's view, that it is distinct. 

 The shell is of more solid growth, and more amply gib- 

 bous, while the pearly uacre, as remarked by Chemnitz, is 

 of a peculiar deep coppery-red. 



March, 1857. 



