THE MOLLUSC A OF COLORADO 1 83 



Longmont and Loveland were assigned to this species by Dr. Bartsch, but Mr. Walker 

 has compared them with his specimens of wolfiana from the type locality and does not 

 consider them the same. 



Physa cupreonitens Ckll. 



Described from specimens found in a hot spring at Wellsville, Cockerell 22, 63. 



Physa gyrina Say. 



Rio Grande, Yarrow 68, 936, 937. Routt Co., Crandall 32, 54. Included under 

 heterostropha by Stearns 50, 103. 



This seems to be the common species in lakes and ditches at Boulder, Windsor, 

 Gault, Ault and Crow Creek. We have received specimens from Prof. F. H. Hop- 

 kins, collected near Meeker, and from Prof. E. Bethel, collected at Denver. 



Physa elliptica Lea. 



Empire, IngersoU 37, 132. Gunnison County, Cockerell 22, 65. 



These records may be P. gyrina oleacea, but we have now no way of determining the 

 matter. A few found at Owen's Lake were referred to this species by Dr. Bartsch, but 

 Mr. Walker considers one of them an immature gyrina and the others not elliptica. 



Physa integer Hald. 



Collected by the writer from a lake at Windsor and ditches at Boulder, by Mr. H. W. 

 Clatworthy at Ft. Morgan, and by Messrs. G. S. Dodds and Harvey Markman at Ham- 

 blin's Lake near Hygiene. 



Physa anatina Lea. 



Mr. Bryant Walker writes that he has specimens from the South Platte at Denver, 

 collected by Mr. Billips. 



Physa cooperi Tryon. 



Animas and LaPlata, but both identity and validity of the species doubted, Inger- 

 soU 35, 401. 



Specimens from Loveland and Owen's Lake are doubtfully assigned to this species 

 by Dr. Bartsch. 



J^^^WB^ Physa lordi Baird. Fig. 46. 



T j^^fi^fe^ Specimens received from Prof. A. E. Beardsley were col- 



\K -^^^^^^^m ^ m lected by him at the head of Rio Grande Canyon, 12 miles from 



V ^^^p '^a^^ ^ Antonita, Conejos County. 



Fig. 46. — Physa lordi. 



Physa virgata Gld. Fig. 47. 



Lodge Pole Creek, collected by Mr. Simpson, Cockerell 22, 61. 

 Fig. 47. — Physa A few specimens from near Boulder and Longmont were referred 



to this species by Dr. Pilsbry but Dr. Bartsch calls them cooperi. Mr. 

 IngersoU 37, 133, mentions some specimens found by him near Denver which he thought 

 might be of this species. 



