N0.1395. CAMBRIAN BRACHIOPODA—WALCOTT. 337 



Formation and locality. — Middle Cambrian. Solomon Formation, 

 235 feet above Tonto sandstone, Grand View Trail, southern side of 

 Grand Canyon, Arizona. 



OBOLUS (WESTONIA) WIMANI, new species. 



Lingula f sp. Nos. 1 and 2. Llngulella f sp. No. 7, "Wimax, Bull. Geol. Institute, 

 Upsala, No. 2, VI, 1903, Pt. 1; Studien Nordbaltische Silurgebiet, pp. 51, 

 52; pi. II ; figs. 30, 31, 32, 36. 



The general form of this species is not unlike that of O. ( Westonia) 

 hottnica. The cardinal slopes of the ventral valve are more rounded, 

 which makes the valve broader near the center. All of the specimens 

 are also smaller. The surface markings are of the same character as 

 those of (). {Llngulella) jTnlandensii< unA 0. (Westonia) Ijottnica. 



It is not improbable that with the discovery of a large series of 

 specimens the three species may be combined, or O. {Westonia) hott- 

 nica and O. { Westonia) wimani placed as varieties of O. { Westonia) 

 Jinlandensis. 



The species is named after Dr. Carl \Mman. 



Formation and locality. — Middle 1 Cambrian. Fine gra}^ sandstone, 

 drift bowlders at Biludden, shore of Getie Bay, Sweden. For reference 

 to geological horizon refer to description of O. { Westonia) hottnica. 



