TESTACSLLA. 147 



of the s}iell_, are exceedingly variable characters in this 



genus. 



It is the Testacella Europcea of De Roissy, who pro- 

 posed a change of name in consequence of Lamarck 

 havings a few months previous to the publication of the 

 * Histoire ^ of Draparnaud, described what was then sup- 

 posed to be the same species under the somewhat similar 

 name of Haliotoides ; but it now appears that Lamarck^s 

 species is the one which I am next about to notice. 



The T. Maugei of Ferussac was observed by the late 

 Mr. J. S. Miller, the Curator of the Philosophical Insti- 

 tution of Bristol, between forty and fifty years ago, in 

 the nursery-gardens of Messrs. Miller and Sweety near 

 that city, where it is still to be found in considerable 

 numbers. It has been since, to a certain extent, natu- 

 ralized or acclimatized in this country, having been ob- 

 served in other parts of Somersetshire, as well as at Ply- 

 mouth and Cork. I may add to this list of localities my 

 own garden at Norton near Swansea, which was occa- 

 sionally supplied with plants from Miller and Sweet^s 

 nurseries. It was originally (in 1801) noticed as a native 

 of Teneriffe; and it appears to be also indigenous to 

 Madeira, the Canary Isles, Portugal, and the South-west 

 of France. A variety of it (called T, Deshayesii or 

 Alta-ripce) occurs in a fossil state at Haute-Rive in 

 France. This species has a smaller head, as weU as a 

 much larger and more convex (almost semicylindrical) 

 shell, than T. Haliotidea. The present spedles is more 

 prolific and gregarious than its congeners. Mr. Norman 

 has kept specimens of T. Maugei y as well as of T. Halio- 

 tidea and its variety scutulum, alive for some time, and 

 has carefully watched their habits in a state of confine- 

 ment. He says that the nest of earth which T, Maugei 

 makes for itself in times of drought reminded him not a 



H 2 



