THE MOLLUSCA OF COLORADO 6 1 



Genus PUNCTUM Morse 



Punctum pygmaeum minutissimum Lea. 



Mrs. Cockerell found two specimens of this minute shell at Tolland last summer 

 (Nautilus, Vol. XXV, p. 58). 



Genus SPHYRADIUM Agassiz 



Sphyradium alticola Ingersoll. 



Floyd Hill (Hand); Tolland (Cockerell); near Ohio City (F. Rohwer) ; Long's Peak 

 Inn (Spangler); Magnolia and Eldora (Henderson). Probably all of our Colorado 

 records of edentulum should be placed under alticola. The differences have been 

 recently discussed by Hanna (Proc. U.S. Nat. Mus., Vol. XLI, pp. 373-376). 



Genus SUCCINEA Draparnaud 

 Succinea retusa Lea. 



I found it abundant on muddy banks of sloughs at Sulphur Springs and Steam- 

 boat Springs, less abundant at Kremmling and Buford. 



Succinea grosvenori Lea. 



I found live specimens abundant on muddy slough bank and dead shells abundant 

 along a creek bank at Kremmling, a few dead shells along the shores of an alkali lake in 

 the southwest comer of North Park. 



Succinea avara Say. 



Granby , Glen wood Springs, Radium and Denver (Bethel) ; Sulphur Springs (Dodds) ; 

 Gibson Peak in Custer County and Florissant (Cockerell) ; Morrison and near Ohio City 

 (F. Rohwer) ; Kremmling, McCoy, Lyons, Rio Blanco, Meeker, South Boulder Canyon 

 and Magnolia (Henderson). Unlike retusa and grosvenori, this species seems to thrive 

 in very dry places as well as in the immediate vicinity of water. The Radium specimens 

 were under rabbit-bush and sage-brush, Glenwood Springs and McCoy specimens in very 

 dry cedar forest. 



Genus GALBA Schrank 



Baker in his recent monograph on the Lymnaeidae of North America has separated 

 from Lymnaea all our Colorado species heretofore recorded under that name, and placed 

 them in the genus Galba. 



Galba doddsi Baker. 



Types collected at Sulphur Springs by Dr. G. S. Dodds, in 1907. Baker also places 

 the West Cliff records of L. truncatula here. 



Galba bulimoides techella Haldeman. 



La Junta (Dodds), specimens identified by Baker. 



Galba bulimoides cockerelli Pilsbry and Ferriss. 



Reservoir seven miles northwest of Longmont (Spangler); Montclair (Markman); 

 pond on Fossil Ridge, south of Ft. Collins (Henderson). Baker, at page 219 of his mono- 

 graph, puts the Florence records of techella (Kenyon) under this species, and also records 

 it from San Luis Valley (Ingersoll), and southeast of Denver (Putnam). 



