THE NAUTILUS. 9 
There were also worn valves of several other Mactride collected. 
Mesodesma arechavalettoi (Ihering MS.) Pilsbry. Maldonado 
Bay, Uruguay (young); Mar del Plata, Argentina. 
Mytilus darwinianus Orb. 
Mytilus edulis L. (2? platensis Orb.). 
Mytilus canaliculus Han. 
Nucula puelcha @Orb. N. uruguayensis E. A. Smith does not 
seem to differ materially from this species. 
Ostreea puelchana d’Orb. 
Pecten nucleus Born, var.? 
Pecten sp. undet. 
Pectunculus longior Sowb. 
Petricola like pholadiformis, but less strongly sculptered. One 
valve. 
Plicatula ramosa Lam. 
Semele (Abra?) uruguayensis n. sp. 
Tagelus gibbus Spengl. (platensis Orb.). 
Tellina uruguayensis E. A. Smith. 
Thracia Rushii un. sp. 
ISAAC LEA DEPARTMENT. 
[Conducted in the interest of the Isaac Lea Conchological Chapter of the Agassiz Associa- 
tion by its General Secretary, Mrs. M. Burton Williamson. ] 
The name of Miss Zeola Downing, Long Beach, California, is 
added to the membership roll of our Chapter. 
When last heard from Miss Anna Goodsell of San Diego, Califor- 
nia, was in Cairo, Egypt, after having visited many countries in the 
Orient. 
FRESH WATER SHELLS IN THE NORTHEAST OF MAINE. 
[From the report of Mr. Olof O. Nylander. From the Transactions of the Isaac 
Lea Conchological Chapter for 1896]. 
This article is devoted to the fresh water shells found in the Fish 
River Lakes and Aroostook River, northeast of Maine. After se- 
curing a good supply of provisions, tent, boat and apparatus needed 
for a long collecting trip in the forest region, a man was employed 
to accompany us through the journey, and a man with a team to 
haul me the distance of 25 miles to Cross Lake on the Fish River. 
