THE NAUTILUS. 93 



and thence across the mountains into the Atlantic drainage, and I 

 determined upon a search for land shells at Natural Tunnel, a few 

 miles up the line from Gate City. It was the kind of day to bring 

 the snails out, warm and steaming, and they did prove to be out, 

 twenty species being bagged. Here, as in Russell county, Polygyra 

 profunda had mostly dispensed with bands. But Polygyra elevata 

 had assumed them. An interesting depauperate colony of this 

 species was found on the face of the cliff between the natural and 

 artificial tunnels. It was scarcely more than half the size of elevata 

 living just out of the northern mouth of the natural tunnel. A 

 mountain brook contained a small and handsome form of Goniobasis 

 aterina Lea. One could stand upright and pick these little fellows 

 from the rocks where they lived in the spray of the falls. From 

 Stock creek, tributary to the Clinch and the stream which carved 

 the natural tunnel, were taken Pleurocera unciale, Goniobasis simplex 

 and Goniobasis aterina this last surely the same or an offspring of 

 simplex. 



Acknowledgments are due to Mr. F. C. Baker, Mr. Bryant 

 "Walker, Mr. A. A. Hinkley and Dr. Victor Sterki for identifica- 

 tions, and to Mr. George H. Clapp for valuable comment on the 

 land shells. 



From a preliminary catalogue made by Dr. Ortmann, and to use 

 which I have his kind permission, the following list of the collections 

 of last May had been made : 



Fusconaia bursa-pastoris (Wright). Clinch River, Cedar Bluff, 

 Cleveland, Fink, St. Paul. 



Fusconaia estabrookiana (Lea). " Synonyms, fassinans Lea and 

 fassinans rhomboideum Simpson and others." Clinch, Cedar Bluff, 

 Fink, St. Paul, Powell, Big Stone Gap, Big Moccasin, Moccasin 

 Gap. 



Fusconaia appressa (Lea) or edgariana (Lea). " Practically 

 nothing but a flattened edgariana." Clinch, Cleveland, Fink, St. 

 Paul. 



Crenodonta undulata (Barnes). Clinch, Cleveland, Fink, St. 

 Paul. 



Quadrula intermedia (Conrad). "Possibly tuberosa Lea and 

 sparsa Lea." Clinch, Cleveland. 



Quadrula cylindrica strigillata (Wright). Clinch, Cedar Bluff, 

 Cleveland, Fink. 



