WILLIS NOVA SCOTIAN SHELLS—GANONG. 421 
Pecten Magellanicus, LAM. Sable Island, Mahone Bay, Lunen- 
burg, &e.; common. 
Pecten Islandicus, Cu. Halifax Harbor, St. Margaret’s Bay, 
Sable Island, &c. ; common. 
Pecten Concentricus, Say. Sable Island only. * 
Nucula Tenuis, Mont. Sambro Banks, &c.; com. 
Nucula delphinodonta, Micu. Fishery Banks; rare. 
Nucula proxima, Say. Do. do. 
Yoldia pygmaea, + MUNCEY. Do. do. 
Yoldia thracieformis, STOKER. Do. do. 
_Yoldia sapotilla, GouLp. Do. com. 
Yoldia limatula, Say. Do. do. 
Yoldia Myalis, CourTH. Do. do. 
Leda tenuisulcata, CouUTH. Do. do. 
Leda Minuta, MULL. Do. rare. 
Modiolaria substriata,} Gray. Halifax Harbor ; do. 
Modiolaria nigra, GRAY. Do. do. 
Modiolaria discors, Lin. Sambro Bank ; not uncommon. 
Modiolaria corrugata, Stm. Sable Island; rare. 
Modiola plicatula, Lam. Wallace, Tracadie, Sable island, Pictou, 
&e.; not scarce. 
Modiola vulgaris,§ FLeminc. Whole coast; com. 
Mytilus edulis, Liv. Do. do. 
Unio complanatus, LEA. Common to most lakes in Nova Scotia. 
Unio radiata, LAM. Grand Lake, on line of Nova Scotia Rail- 
road ; not common. 
—, (?) Dartmouth Lakes, perhaps new to Nova Scotia. 
het Wi 
Anodonta Ferussaciana, || (?) Dartmouth Lakes; common. 
Anodonta Implicata. Lakes on line of Railroad ; rare. 
Anodonta ——— (?). Two varieties, from Prof. McCULLOocH, 
probably new to Nova Scotia; St. Mary’s River, Truro. . 
Unio 
* Hither this species, or the preceding, probably this, occurs in the shallower parts of the 
Guif of St. Lawrence. See Bull, Nat. Hist. Soc., N. B. No. VIII.. pp. 68, 69 
+ Leda pygmaert. A European species, not yet reported elsewhere in American waters 
except by Jeffreys (Brit. Conch. V., p. 173), who gives Scandinavia and Maine. 
t Montacuta substriata, Mont, It has not been reported from American waters by any other 
writer. 
§ M. modiolus. 
|| Undonbtedly some other species. Lea (Obs. genus Unio., X , p. 87), gives this species 
only from the Ohio Valley. 
