82 



THE NAUTILUS. 



places, and at no point is it shallow. The width, on the other 

 hand, is but a few hundred yards except at Wiscasset, where it is 

 three quarters of a mile wide. The river is famous for its scallops, 

 Peden magellanicus Gmelin, these occur for the most part in the 

 lower part of the river. 



It was frequently reported to me that oysters were to be found 

 " up river " four or five miles. I am sorry to say I had but one day 

 " up river; " that trip, however, revealed the fact that a very nar- 

 row spot known as the Falls, separated an upper basin from the 

 main part of the river. Here in the warmer waters oysters do 

 occur, but very few and far between. With the oysters I found a 

 few of the old companions noticed in Northumberland Straits, and 

 abounding south of Cape Cod. 



As a whole this river is rich in specimens, and the cold and warm 

 water species are by no means distant neighbors. Some forms are 

 dwarfed, some like Bullinella alba, are colored probably by 

 iron to a darker shade than tlie normal. I believe that more spe- 

 cies may be added to the list by a more careful search above the 

 place dredged, I give the list of those found by me in the ai'ea 

 extending four or five miles each way from AViscassett. 



Mya arenaria Linn, 

 Pandora gouldiana Dall. 

 Lyonsia hyalina Conrad. 

 Saxicava rugosa Lam. 

 Macoma balticavar. fusca Say. 

 Cryptodon gouldii Stimp. 

 Astarte undata Gld. 

 Gemma gemma var. totteni 



Stra. 

 Cardium pinnulatum Conrad. 

 Venericardia borealis Conrad. 

 Nucula proxima Say. 

 Nucula dolphinodonta Migh, 

 Yoldia sapotilla Gld, 

 Mytilus edulis Linn. 

 Modiola modiolus Linn. 

 Modiola plicatula Lam. 

 Modiolaria nigra Gray, 



" discors Linn. 



Crenella glandula Stiuip. 



Pecten magellanicus Gmelin. 

 Ostrea virginiana Gmel, 

 Anomia simplex Orbigny ? 



" aculeata Gmel, 

 Diaphana debilis Gld. 

 Utriculus gouldii Stimp. 

 Bullinella alba Brown. 

 Chiton marmoreus O. Fab. 

 Chiton albus Mont, 

 Acmtea testudinalis Mull. 

 Puncturella noachina Linn. 

 Skenea planorbis Fabr. 

 Cingula minuta Totten. 

 Onoba aculeus Gld. 

 Lacuna vincta Mont, 

 Litorina tenebrosa ]Mont, 



" litorea Linn. 



" palliata Say. 

 Odontostomia bisuturalis Say. 

 Odontostomia trifida Totten, 



