4 AURIC ULID-a:. 



Dr. Gray (1840) first applies the name Auriculidce to a well- 

 characterized family of Pneumonobranchia inoperculata aquatilia, 

 in which are enumerated as British genera, Carychium, Acme 

 and Conovulus. 



In the Synopsis of the Contents of the British Museum, 1840 

 and 1842, Dr. Gray says, " The family of Auriculidce, case 26, 

 are peculiar from having cylindrical tentacles, like the land- 

 slugs, and their eyes are placed on the inner side of the base of 

 these tentacles. They have a rugged conical muzzle. The 

 mantle is thin, with a thickened edge ; they are always pro- 

 vided with an external spiral shell, which has a plaited pillar in 

 all ages ; and the animal has the peculiarity of absorbing the 

 septa which separate the cavities of the whorls froni one 

 another : even in Scarabus, which has these parts only incom- 

 pletely developed, the true Auriculce have a thickened edge to 

 the mouths of the shell, which is covered with a brown peri- 

 ostraca. The Scarabus, like Ranellce, forms half a whorl be- 

 tween each period of rest, the thickened and reflexed part of the 

 lips forming an edge on each side of the shell : the Sidula has 

 a sharp internal ridge to the outer lip. Carychium is one of the 

 smallest British shell-bearing mollusca ; it has a sinuated mouth 

 and a reflexed lip like a Bulimus. The Conomdi, which are found 

 under stones on the sea-shore and in the mud of salt marshes, 

 have an obconic shell with a narrow linear mouth ; and the Che- 

 lince, which live in clear running streams in South America, have 

 much the habit of the pond snails (Lymncece), from the shells of 

 which they are chiefly to be distinguished by the sharpness of 

 the plaits on the pillar, and by the shell being spotted." (p. 131. 

 1842, p. 81.) Genera: 1. Auricula; 2. Melampus; 3. Sidula; 

 4. Tralia ; 5. Detracia ; 6. Pedipes ; 7. Marmula ; 8. Ovatetta ; 

 9. Leuconia ; 10. Scarabus ; 11. Cliilina {Ida) ; 12. Carychium ; 

 13. Acme. (Ed. 1842, p. 91.) 



In the Proc. of the Zool. Soc. 1847, p. 179, the same author 

 comprises in the family of Auriculidce the genera Auricula, Me- 

 lampus, Cassidida, Pedipes, Marinula, Ophicardelus, Alexia, Leu- 

 conia, Scarabus, Carychium, Acmea ; and (1850) in Mrs. Maria 

 Emma Gray's Fiy. Moll. An. iv. 118, the genera Auricula, Me- 

 lampus, Cassidula, Pedipes, Ophicardelus, Alexia, Scarabus. 



Cantraine (1841) designs with the same name the fifth family 

 of Pulmonata, with the Mediterranean genera Carychium, Au- 

 ricula. 



D'Orbigny (1841) enumerates in the same family the genera 

 Carychium, Scarabceus, Auricula. 



L. Pfeifi'er (1841) adopts the family of Auriculacea among 

 the Gasteropoda ccelopnoa yymnostoma dicera, and gives (1853) 

 a more exact description of this family, which he proposes to 



