WEST COAST PULMONATA. 359 



nearly 1,600 feet altitude, and others from Fresno County, 

 and near San Diego, both being of the large Oregon form, 

 unlike the small form, so-called, existing in the northern 

 California coast ranges, where it is the size of M. sportella. 

 Considering that the banded species of the Sierra extend 

 toward San Diego along the coast, the large form seems to 

 have reached there by the inland route, and not by the 

 coast range of mouutains. 



It may be remarked that toward the southern end of the 

 Sierras even the Yitrinoid species seem limited to a narrow 

 belt at about 5', 500 feet, none being known in the High 

 Sierras above there, nor on the lower slopes; while atTeha- 

 chapi Pass none occurred at any elevation below 4,000 feet- 

 Still there seems no reason why they should be absent 

 on the higher slopes up to near the snow line, as they were 

 found in the Rocky Mountains to 9,000 and 11,000 feet by 

 E. Ingersoll. 



The large species of the lower elevations also seem to be- 

 come scarcer on these southern parts of the range, appar- 

 ently because the lower parts are too dry and the higher too- 

 cold for them, but search has not been made carefully 

 enough to prove this. The White River locality is the only 

 one known for 150 miles, though they no doubt occur at in- 

 tervals nearly all that distance. 



While a very interesting group of species was found by 

 Harford and Dunn at the Mariposa Big Tree Grove near 

 5,500 feet altitude, near lat. 37^ 30', none have been re- 

 ported from Yosemite Yalley at 4,000 feet, and few farther 

 south. As the most extensive list of the southern Sierra 

 species yet known, I here publish it for the first time. 



A. Yitrinoid species: 1. Ilyalinaarhorea] 2. Conulusfid- 

 viis] 3. Fatula striatella cronkJiitei. 



B. Helicoid species: 4. Helix mormonum (small) ; 5. He- 

 lix traski franki (dwarfed); 6. Helix tudiculata (dwarfed); 

 7. Triodojms loricata-, 8. Polygyra har/ordiana, (9 miles, 

 south, in the Fresno grove. ) 



