92 The Ottawa Naturalist [July 



In any case it should be added to our list as occurring in the Quyon. 

 In outward appearance it resembles a small specimen of the com- 

 mon brown clam, Unto complmiatns. — F. R. L. 



iNTRODUCtD MoLLUSCA. 



It is well known that the eggs of many species of moUusks, 

 as well as the mollusks themselves, are highly resistant to heat 

 and cold, and that some endure desiccation extending over long 

 periods of t'me. The eggs are frequently deposited among the 

 roots and stems of grasses and plants. Several species have been 

 widely distributed in the straw^ used for packing articles shipped 

 from Europe to this country. I have no doubt that Helix cantiana, 

 which abounds at Quebec in restricted localities near the Citadel 

 and the Observatory, originated in the packing material thrown 

 over the walls of the fortress and on the declivity above the Cove 

 Fields. Two notable importations were brought to my notice 

 some time ago. One was the large European slug, Limax niaxi- 

 iniis, L., which was found by Mr. Scrim in one of his conserva- 

 tories at Ottawa. The animal had an extent of over four inches, 

 and would in large numbers be very destructive. Fortunately it 

 occurs but rarely and is easily seen. But the other, Zonites 

 alliariusy is a much more serious pest. It is minute in size and 

 occurs in considerable numbers. Mr. Scrim finds it chiefly in the 

 greenhouse devoted to the cultivation of palms, ferns and selagi- 

 nellas. The lace-like traceries wrought on the under surface of a 

 leaf betray the presence of the tiny operator and result in his de- 

 struction. When crushed by the horny-handed toilers in the 

 greenhouse, the animal gives forth with its dying breath a strong 

 and sur))risingly permanent odur of garlic. Hence the specific 

 name — alliarius, L. — F. R. L. 



I have received from Mr. G. A. Knight, of Mount Tolmie 

 Nurseries, Victoria, B.C., specimens of this European Mollusk 

 which he has found in some numbers in his greenhouses. — J. F. 



