142 THE NAUTILUS. 



but its tough little foot is not conducive to the happiness of persons 

 of feeble digestion. The fine clam Tresus is seldom, if ever, seen 

 on the stalls in the San Francisco markets. It is noble in size and 

 a patrician in quality, and makes a most delicious soup or chowder. 

 Los Angeles, Cat., March 8, 1908. 



THE MOLLUSCA OF NORTH HAVEN, MAINE. 



BY HENRY JACKSON, JR. 



The Fox Islands constitute an archipelago in the mouth of Penob- 

 scot River. The largest of these islands is Vinal Haven, and next 

 in size and position is North Haven. On either side are bays rang- 

 ing from 4 to 8 fathoms in depth, with many varieties of bottom. 

 The land is equally well adapted for shell collecting, except that there 

 are practically no hard-wood trees. It is very peculiar that quite a 

 number of species have one small place in which they are abundant, 

 and they are not to be found elsewhere. The fresh-water shells have 

 a very fair chance ; there is a large pond about one mile long which 

 promises large returns in time. There are also several semi-marshy 

 tracts in which many smaller Limneas are found. Unfortunately I 

 have not been able to dredge beyond 30 fathoms. So it is to be 

 hoped that more species will soon be turned up. 



My sincere thanks are due to Dr. Charles G. Weld, Prof. Edward 

 S. Morse, Mr. Dwight Blaney and Mr. C. W. Johnson, for identifi- 

 cation of various mollusks and other acts of kindness. 



POLYPLACOPHORA. 



Trachydermon ruber, Linn6. Trachydermon albus, Linne. 

 Common. Rather common. 



PELECYPODA. 



Nucula proximo, Say. Very Toldia myalis, Coutbouy. Rare. 



common. Large specimens A few specimen dredged in 



were found in four fathoms eight fathoms water. 



mud. . Yoldia lucida, Loven. Two 



Toldia limatula, Say. Very specimens dredged in twenty 



common. Beautiful specimens fathoms mud. The eggs were 



over two inches long were ob- in the shell. 



tained. 



