1881.] NATURAL SCIENCES OF PHILADELPHIA. 109 



other as to indicate a wide and general disti'ibution within its 

 boundaries. These localities are as follows, commencing at the 

 easternmost station : 



1. Utah Territor}" ; near Utah Lake, in Wahsatch Mountains, 

 collected hy Dr. Edward Palmer. Museum Stearns. (Semi- 

 fossil. ) 



2. Nevada (Tertiaries) ; as Vorticifex Tryoni, Meek, in King's 

 Survey. 



3. California ; Owen's Yalley, collected living by Hemphill ; 

 " The most southern locality. The animal undistinguishable 

 externally from that of PJanorhia ammoiV Cooper. 



4. California ; Klamath Lake and Canoe Creek, living ; Dr. J. 

 S. Newberry. S. I. Collection. 



5. California; Pitt River, Dr. Cooper ; living. S. I. Collection. 



6. California; Clear Lake, living; Dr. Yeatch. S. I. Collec- 

 tion. Cooper makes a var. ? ''minor'' of specimens from this 

 place. 



7. California; Antioch ; living. Carlton. '* A few A^ery young 

 ones, perhaps a dwarfed southern variety like those from Clear 

 Lake." 



8. California; Livermore Valley, Alameda County; "in the 

 hills north of Martin's, near Tassajara," Cooper, fossil ; label 

 marked " Planorbis, etc., Tertiary? " in State Geol. Survey Coll., 

 Univ. of Cal. 



The Utah specimens, though small, are mature, and include the 

 form rounded above like Meek's Nevada species, as well as the 

 more flattened and grooved features of the Tassajara ^ specimens, 

 which approach in size and general characters more closely to 

 Lea's type, fig. 25. Some of Palmer's Utah specimens are elevated, 

 and vary in the direction of fig. 27, though not terraced or keeled 

 as much ; the lot of only a dozen specimens, exhibits a remarka- 

 ble range of variation. 



There are striking analogies between the shells of Garinifex 

 in its varieties, and the Australasian brackish water Amphibolse. 



A new species has been made on one of the varieties by Mr. 

 Smith, of the British Museum, which he named C. Ponsonbii;'^ 



^ Tassajara is the name of a stream which is frequently dry in the latter 

 part of summer. 

 '^ Proc. Zool. Soc., 1875, p. 536. Also Quar. .Tour. Conch., Vol. I, p. 150. 



