48 LAND AND FRESH WATER MOLLUSKS 



This is the common slug of British Columbia and Alaska, found in 

 damp places in the wooded region. It varies from dark maculate to 

 yellowish olive, and when full grown may reach a length of eight or 

 nine inches, when fully extended. It is very fond of the leaves of the 

 Alaskan skunk cabbage, a taste shared by bears and the Alaskan deer. 

 It produces a profuse and most tenacious slime. When the Indians 

 wish to catch the ruby -throat humming bird they gather two or three 

 of these slugs and whip them with small bare twigs. Under this 

 treatment slime is given off in large quantity and adheres to the twigs, 

 which are afterward placed among the flowers visited by the hummers. 

 If they alight on one of the twigs they cannot escape from the ad- 

 hesiveness of this singular birdlime. It is said one of the ancient chiefs 

 had a cape entirely covered with the resplendent plumage of the male 

 ruby-throat, and which was regarded as incredibly valuable. The 

 black spotted form seems to have been named maculatus, by Cockerell, 

 and the yellow mutation stramineus , by Hemphill, but they occur in- 

 discriminately in Alaska and are probably only individual color-muta- 

 tions. 



'Ariolimax steindachneri Babor. 



Ariolimax steindachneri BABOR, Ann. K.K. Naturh. Hof-Museum, Wien, xv, 

 p. 85, 1900. 



Range. Puget Sound. 



I am unable to state whether this is distinct or one of the mutations 

 of A. columbianus. 



Genus Hemphillia Bland and Binney. 



FIG. 32. Hemphillia glandulosa Binney. 



* Hemphillia glandulosa B. and B. 



Hemphillia glandulosa BLAND and BINNEY, Ann. Lye. Nat. Hist. N. Y., x, 

 p. 209; pi. ix, figs, i, 3, 5, 15, 16, 17, 1872. PILSBRY and VANATTA, 

 Proc. Acad. Nat. Sci. Phila., for 1898, p. 233, pi. ix, figs, i, 2 ; pi. xn, 

 figs. 49, 50. 



Range. Astoria, Oregon, and Puget Sound region. 



* Hemphillia camelus Pilsbry and Vanatta. 



Hemphillia camelus PILSBRY and VANATTA, Nautilus, xi, p. 44, Aug., 1897 ; 

 Proc. Acad. Nat. Sci. Phila., for 1898, p. 234, pi. ix, figs. 3, 4 ; pi. xn, 

 figs. 41, 42 ; pi. xvi, fig. 85. 



