AND OTHER FAMILIES. 83 



Hab. Peru. Lieutenant Humphreys. 



My Cabinet. 



Cabinet of the Academy of Natural Sciences of Philadelphia. 



Diam. -3, Length -5 inches. 



Remarks. — The genus 3ie/a?20/;.s?s, a few years since, presented, to our 

 knowledge, only two species. These were described by Lamarck. The 

 rapid advancement of our science has recently brought to light many 

 new ones. I have eight species in my own cabinet, and in this memoir 

 I add two species to the ten now known. These two are peculiarly 

 and beautifully spotted in the epidermis. The two specimens brought 

 by lieutenant Humphreys have each four transverse purple bands on 

 the inside, and the dark olive epidermis is filled with very distinct in- 

 tensely dark brown quadrate spots. This species, and the princeps 

 herein described, form a division in the genus Melanopsis of Lamarck 

 which genus should be altered, leaving out the character of the callus 

 on the upper part of the columella. Neither of these has that char- 

 acter, but, notwithstanding, should not be removed to a new genus, as 

 it is, independent of that, a perfectly natural one. 



Auricula fuscagula. Plate XIX. fig. 76. 



Testa fiisiformi, albidd, pellucidu ; suturis impressis et albo-lineatis ; labro late 

 reflexo ; gulci fused et deniibus novenis munitu. 



Shell fusiform, wliitish, dinplianous ; sutures impressed and presenting a white line ; 

 outer lip widely reflected ; throat dark brown and furnished with nine teeth. 



Hab. Brazil. 



My Cabinet. 

 Cabinet of P. H. Nicklin. 

 Diam. -4, Length 11 inches. 



Remarks. — This is a very remarkable and interesting species. In 

 its general form and aperture it resembles a Clausilia. Like some 

 species of that genus its mouth is studded with teeth. Of the nine, 



