42 BULLETIN OF THE 



Zonites indentatus, SAY. 

 Zonites viridulus, MKE. 



Portland, Oregon (Hemphill) : Victoria, British Columbia (Rev. G. W. 

 Taylor). 



Zonites milium, MORSE. 

 Zonites chersinellus, DALL. 

 See Supplement I. 



Zonites fulvus, MULL. 

 Vitrina Pfeifferi, NEWC. 

 See page 26. 



Limax campestris, BINN. 

 Liraax Hewstoni, J. G. COOP. 

 Limax hyperboreus, WESTERLUND. 



See Man. Arner. Land Shells, p. 473. 



A species collected in Arctic America by the "Vega." I am indebted to Mr. 

 Dall for a specimen froni Commander Island, Siberia. 



Jaw arched, smooth, with median proj ection. Lingual membrane with about 

 42-1-42 teeth. Centrals tricuspid : laterals bicuspid, twelve in number on 

 each side: marginals about thirty in number on both sides, aculeate, simple, 

 without bifurcation or side spur. Fig. 516 of Man. Amer. Land Shells shows 

 a central tooth with its adjacent lateral and three extreme marginals of Mr. 

 Ball's specimen. 



From Seattle, Washington Territory, I have received a small Limax similar 

 in outward appearance to hyperboreus, and with similar dentition. 



See Westerlund, Sibirien Land och Sotvatten Mollusker, p. 21. 



Prophysaon Hemphilli, BL. & BINN. 

 Prophysaon Anderson!, J. G. C. 



It is a true Prophysaon, though described originally as an Arion. 



The lingual membrane has 30-1-30 teeth, with about 12 perfect laterals. 

 Centrals tricuspid : laterals bicuspid : marginals with one long, stout, oblique 

 inner cutting point, and one outer, short, blunt, sometimes bifid cutting point. 

 Resembling that of P. Hemphilli. 



Jaw low, arcuate, ends blunt ; with numerous (over 15) irregularly devel- 

 oped, broad, stout ribs, denticulating either margin. 



Animal small, long, and slender, dirty white with dark reticulations : an in- 

 distinct dark-colored circle around the mantle near its edge, and a dark band 

 running longitudinally from the rear of the mantle to the tail on each side of 

 the centre of the back. 



Reticulations foliated as in Prophysaon Hemphilli and in the figure of Arion 

 foliolatus. The mantle covered with minute tubercles, not foliated. 



