176 PROCEEDINGS OF THE ACADEMY OF 



Amalia marginata, as figured by Heynemann (1. c. pi. III., fig. 7). 

 Goldfuss also (1. c. 1856, pi. IV., fig. 3) figures the dentition of 

 L. marginatum as the same. 



Limax camjyestris, Binney (pi. IV., fig. 5, a. b. c). One speci- 

 men has 40 1 40 teeth, 18 perfect laterals. Another gives 

 36 1 36, with 11 perfect laterals. The centrals and laterals ai-e 

 of the same t} r pe as described above in L. agrestis, excepting that 

 there is no peculiar inner side cutting point to the first laterals. 

 About half of the marginals are bifid. I find great difficulty, 

 however, in detecting any bifurcation on the extreme marginals. 



As stated above, Heynemann's figure of the dentition of L. Wein- 

 Jandi could not have been drawn from this species. I have no in- 

 formation in regard to L. Weinlandi other than what I find in 

 Malak. Blatt. X. 212, pi. III., fig. 1. Judging from the dentition 

 alone I should hardly consider it distinct from agrestis. 



L. campestris differs greatly in its genitalia from L. agrestis, 

 to which it has been compared. 



This completes the list of North American Limaces now known. 

 I will add that maximus and Jiavus are put by Heynemann in the 

 s. g. Heynemannia ; agrestis in s. g. Agriolimax ; campestris 

 would be placed by him in s. g. Malacolimax ; while Hewstoni 

 would be placed b} r him in the genus Amalia. 



Since the above was written I have received specimens collected 

 in the mountains of Colorado by Mr. Ernest Ingersoll, of a species 

 for which I propose the name L. Ingersolli. A full description 

 will be published later. I wdl here simply state that there are 

 50 1 50 teeth, with 16 perfect laterals. All the marginals have 

 a blunt spur to the cutting point, so that they may be said to be 

 biuntly bifid. 



The dentition of Limax is nearly allied to that of Zonites. The 

 lateral teeth are arranged in straight transverse rows, the mar- 

 ginals in oblique rows, as aculeate marginal teeth always are. 

 This tendency to obliquity in the rows of aculeate teeth we have 

 seen most plainly shown in Glandina. To show the general 

 arrangement of the teeth in straight and oblique rows I repeat 

 the figure by Morse in L. and Frw. Sh. N. A. I., which was pro- 

 bably drawn from L. agrestis. It must be borne in mind that this 

 figure is not intended to show the characters of the separate teeth, 

 for which I refer to my plate. 



The genus Limax differs from Zonites in its dentition by hav- 



