146 PROCEEDINGS OF THE ACADEMY OP 



character. It does not even coincide with the outline of the at- 

 tached portion, or with the shell, and, though general, is in some 

 so faint as to be scarcely visible. 



The L. fuliginosus, Gld., seems very similar, and might pass 

 for the same, though described as from " New Zealand," but has 

 ferruginous tentacles. 



It is barely possible that this species was introduced from China 

 or elsewhere, as I have not met with it beyond the vicinity of San 

 Francisco, but it is so exceedingly numerous in every garden here 

 that it seems indigenous. It is found in drier places than our 

 others, and is active all summer in moist shady places. I find 

 none like it described from Asia or Europe. 



LIMAX (EULIMAX) CAMPESTKIS, Binney. 

 Var. Occidentals. PI. 3, fig. C. 1 to 5. 



This, the only indigenous eastern species, has not been before 

 announced from west of the Rocky Mountains, and I, therefore, 

 give a figure of the California form which appears rather more 

 robust than the eastern. It presents the same range of colors, 

 from amber-brown to black, being paler when it first emerges from 

 its retreat in the dry season. I have found it numerous at San 

 Francisco and Santa Cruz, at Clear Lake, Alta, 3625 ft. elev. on 

 west slope of the Sierra Nevada, and Truckee, 5866 ft. high on the 

 east slope, besides observing probably the same at points near 

 lats. 31 and 39 in the valleys. It has not been noticed in 

 Oregon. 



ARIOLIMAX CALIFOENICUS. Cp. n. s. ? PI. 3, fig. D. 1, 2, 3. 



Sp. en. A. forma, colore, etc. "A. Columbiano 1 " 1 similis, sect sulcis 

 dorsalibus multo frequentioribus ; srcpe bis nuniero, et transverse reti- 

 culatis. 



Resembling A. Columbianus in form and color, but with the 

 dorsal grooves much more numerous (26 to 36), often twice as 

 many, and the connecting reticulations transverse. 



The figures given of portions of this form, taken from life, show 

 the remarkable dissimilarity in the reticulations of the dorsal 

 region, and, did I not find considerable variation among them, I 

 would consider it certainly a different species. 



The black form next mentioned agrees with the Oregon animal 

 in this character as shown in E. Young and adult of the yellow 

 form, from one to six inches long, all show the same peculiarity, 



