296 LAND AND FRESH-WATER SHELLS OF N. A. [PART J. 



Fig. 531. 



Lingnal dentition of Tehcnnophnrrts cnrnHnensis. 



The internal rudimentary, nail-like shell described by Dr. 

 Gray, has not been noticed by any American author. 



The habits of the genus are similar to those of the native 

 species of Limax. 



Beside th.e two species found in this country one has been 

 described from Costa Rica by Morch (Mai. Blatt. YI, 110). 



This genus was first described, in 1842, by Binney (Bost. 

 Journ. Nat. Hist. IT, 163)> under the name of Tebennophorus. 

 No other descriptions of it have been published. The three 

 species of it have been referred by various authors to other 

 genera, such as Limax, which diffei-s in having a small shield- 

 like mantle, a different shaped jaw, &c. ; and to Philomijcus, a 

 genus distinguished by the absence of a mantle. The latter 

 genus probably existed only in the fertile imagination of 

 Rafinesque, the same "habitat" where flourished Tr-emcsia and 

 Deroceras.^ 



Ferussac repeats (1823) the description of Rafinesque, but 



' See descriptions of tlip-e singular ;iniinals in the new edition of 

 Eafin(-sqne'!5 Complete Concliological Writii.ii^s. Bailliere, New York, 18(j4. 

 See also Terr. Moll. I, 51, 52. 



