110 THE NAUTILUS. 



SHELL-BEARING MOLLUSCA OF FRENCHMAN'S BAY, MAINE. 



BY DWIGHT BLANEY. 



In addition to the one hundred and twenty- seven species and five 

 varieties of Mollusca collected in Frenchman's Bay, Maine, by the 

 writer during 1901-4 (a list of which was published in the Proceed- 

 ings of the Boston Society of Natural History, vol. 32, no. 2, pp. 23- 

 41, 1904), the following six species (one of which is new to science) 

 and two varieties were added during the summer of 1905, making a 

 total of one hundred and thirty-three (133 plus 7 varieties) species 

 and seven varieties from this locality. 



Astarte quadrans Gould. 



One valve, identified by Dr. W. H. Dall, dredged oflf Great Head, 

 Ironbound Island. 



Astarte portlandica Mighels. 



Many valves, and a few live specimens dredged off Heron Island 

 on shelly bottom, 10 fath. From study of these specimens Dr. Dall 

 writes us that he now thinks this " a good species as described by 

 Mighels in 1843, provided a larger series of' A. quadrans' than I 

 have been able to consult does not show gradations between the two 

 species." 



Cochlodesma leanum Couthouy. 



Two valves dredged off Seal Cove, Ironbound Island, about 15 

 fath. This shell which is commonly found much further south will 

 probably be found alive in the warmer waters up the bay. 



Sipho stimpsoni Mb'rch, var. liratulus Verrill. 



A few have been dredged the past few years at the same stations 

 as the " stimpsoni" but were only lately identified for us by Prof. 

 Verrill and Miss Bush. They were all young specimens. 



Columbella (Astyris) dissimilis Stimpson. 



Columbella zonalis Linsley. 



Two specimens dredged off" the Spar Landing, Ironbound Island, 

 15 fath., shelly bottom, October, 1905. One alive. 



Grepidula fornicata (Linne). 



Found on stones of Howard's Island at very low water. Verrill, 



