MUSEUM OF COMPARATIVE ZOOLOGY. 205 



In a note written in answer to an inquiry addressed to him regarding this singular 

 discrepancy, he says, " My description and figure are from an individual, not from 

 the species. I am absolutely sure my specimen was one of the original find." 

 His figure, drawn by Morse, rather represents a comparatively smooth, semi- 

 transparent shell. 



Limax hyperboreus. 



See Manual of Amer. Land Shells, p. 473. I have figured on Plate VIII. 

 Fig. F, an individual from British Columbia. Here I give the dentition. 



Jaw arched, smooth, with blunt median projection. Lingual 

 membrane with 42-1-42 teeth ; centrals tricuspid ; laterals bi- 

 cuspid, 12 in number on each side; marginals about 30 on each 

 side, aculeate, simple, without bifurcation or side spur. 



The figure shows a central tooth with its adjacent lateral, and 

 three extreme marginals. 



Limax montanus, L. castaneus, L. occidentalism and L. campes- 

 tris all have side spurs to their marginal teeth. Otherwise, their 

 dentition shows no specific distinction from that of hyperboreus. 

 Until the genitalia of the last is shown to vary, I am inclined Limax hyper- 

 to believe all four to be one and the same species. boreus. 



Limax Hemphilli. 



Mr. Henry Hemphill has sent me in spirits from Julian City, California, a 

 small, slender, smooth, dark species of Limax, 20 mm. long in its contracted 

 state. It does not outwardly resemble Limax agrestis, nor does it seem prob- 

 able that that species would have been accidentally introduced from the Eastern 

 cities. 1 The dentition, however, agrees with that of agrestis by its having the 

 peculiar side spur to the larger cutting point of all the lateral teeth. I venture 

 to propose a specific name for it, in hopes of having an opportunity later to 

 fix its specific position by an examination of the genitalia. It is figured on 

 Plate VIII. Fig. E. 



The jaw is as usual in the genus. 



There are 50-1-50 teeth to the lingual membrane, of which ten on each 

 side are laterals. Centrals tricuspid; laterals bicuspid, the larger cutting point 

 having a well developed side cutting point on its inner side ; the laterals have 

 also an inner, slightly developed, horizontal side cusp, bearing a small, stout 

 cutting point (see Plate I. Fig. 13); marginals simple, without side spur. 



The figure on Plate II. Fig. 3, shows one central with its adjacent laterals, 

 an outer lateral, and several extreme marginals. 



A specimen, apparently of the same species, from British Columbia, has 

 53-1-53 teeth, of which 13 on each side are laterals. 



I have the same species, with similar dentition, from San Tomas, Lower 

 California (Hemphill). 



1 It is, however, found in San Francisco. 



