AMALTA. 215 



Var. RUSTICA, Millet. Smaller, grayish, carina whitish. A. affinis, 



Millet is a synonym. 



Marchioness Paulucci has recently described vars. fulva and 

 Mongianensis, both from Calabria, the former of which maybe a 

 var. of the next species. Several of the succeeding species 

 would, I think, have been better treated as varieties; however, 

 I yield to general opinion. 



A. CARINATA, Risso. PI. 52, figs. 35-39. 



Distinguished from the preceding species by its larger size, 

 by the black-tinted sulcus of the shield, by the lateral zone not 

 being prolonged anteriorly beyond the sulcus, and by the short 

 black lines between the ruga' of the back. Length, 3-5 inches. 



Southern France, Italy. 



Limax argillacetix, Gassies (unfigured), and L. Sowerbyi^Fer. 

 (fig. 39), may be considered synonyms. The latter is sometimes 

 adopted as the name of a species including L. aryillaceus, and 

 L. carinatus, Leach, non Risso, but I cannot find any valid char- 

 acters for its separation. 



Lessona and Pollonera consider A. marginata, var./itZua, Pau- 

 lucci, the young state of a typical A. carinata. They describe 

 the following varieties : 



Var. TYPUS. More or less brownish, the dark lines of the back 



distinct, shield-sulcus black. 



Var. PALLIDISSIMA. Like the preceding, but light colored. 

 Var. INSOLITA. Like the preceding, but shield-sulcus not black. 

 Var. ORETEA. Typical, but with a central black zone on the 



shield. 

 Var. CASERTANA (figs. 37, 38). Powdered with black dots, the 



dorsal black lines obsolete ; shell-plate thick, flattened above, 



irregularly convex below. 



A. TYRRENA, Lessona and Pollonera. PI. 53, figs. 41-43. 



Whitish, with very small brown dots on the back and shield, 

 dorsal sulci blackish, shield gibbous, emarginate behind, with a 

 rounded black sulcus, angulated in front and on the right side ; 

 carina whitish, flexuous at the tail ; head and tentacles blackish ; 

 sole with dark median and lighter lateral zones. 



Length (in alcohol), 22-23 mill. Naples. 



