58 



THE NAUTILUS. 



Near the Yacht Club pier were found many Polinices heros, 

 and their red-brown "sand-collars." In the Jacquet were 

 many Litorina littorea and Litorina rudis. On the exposed beach, 

 nearer the town, we found Mytilus edulis. On the rocks, in the 

 Racquet, we found Thais lapillus and a host of Acmaea testudin- 

 alis ranging in size from one-eighth of an inch to about an inch 

 in diameter. In the mud, at the base of the rocks, were a mul- 

 titude of Buccinum undatum, Neptunea decemcostata, ranging in 

 size from one-eighth of an inch to about an inch in diameter. 

 In the mud, at the base of the rocks, were a multitude of Buc- 

 cinum undatum, Neptunea decemcostata, and Colus stimpsoni, all 

 alive and half-buried. Some dead specimens of Aporrhais occi- 

 dental were also found, five of them being full-grown. 



On the suggestion of Capt. Danforth, we constructed a 

 dredge, and endeavored to dredge Bear Island Bar from his 

 motor-boat. Here we found quantities of Lacuna vincta, Alec- 

 trion obsoleta, Cylichna alba, and two Polinices triseriata. 



There were some soldiers encamped at Digby, and they used 

 to gather Litorina littorea and steam and eat them, without any 

 flavoring. They sometimes ate Thais lapillus also. One day, 

 after a rain, we found two Helix hortensis crawling along the 

 road. 



A NEW TYPE OF THE NAYAD-GENUS FUSCONAIA. 

 GROUP OF F. BAENESIANA LEA. 



BY A. E. ORTMANN. 



During the study of the nayad-fauna of the upper Tennessee, 

 the present writer found that there exists, in this region, a 

 peculiar type of shells, belonging to the genus Fusconaia, the 

 various forms of which have been described previously under a 

 great number of specific names, which, however, seem to belong 

 all to one species. In addition, among material received from 

 L. S. Frierson from the Ozark Mountains, a form was discov- 

 ered which presented the same structure. 



The oldest name for the upper Tennessee form is Unio bar- 

 nesianus Lea. A more detailed account of its various phases is 

 to be given elsewhere, and it suffices here to mention only those 



