PLATE XLVIII. ISP 
Osotus (WEsToNIA) BorTnicus (Wiman) (p. 454). 
Fieurss 4 and 4”. Top and side views of an almost perfectly preserved ventral valve, the type specimen. Specimen in 
the collection of the University of Upsala, Sweden; cast in the United States National Museum 
(Cat. No. 57089a). 
4a. Exterior of a partly exfoliated dorsal valve. Specimen in the collection of the University of Upsala, 
Sweden; cast in the United States National Museum (Cat. No. 57089b.) 
4b. Imperfect cast of the interior of a dorsal valve. Specimen in the ¢ollection of the University of Upsala, 
Sweden; cast in the United States National Museum (Cat. No. 57089c). 
4c. Interior of a dorsal valve. Specimen in the collection of the University of Upsala, Sweden; cast in the 
United States National Museum (Cat. No. 57089d). 
Figures 4, 4a-c are drawn from the specimens illustrated by Wiman [1902, Pl. II, figs. 41-44, respectively] as 
Lingula bottnica. The specimens represented are all from Locality 311, Middle? Cambrian drift bowlder of sandstone 
on Eggegrund Island, Gefle Bay, Sweden. 
Oxso._us (WestTonIA) wimant Walcott (p. 467). 
Ficure 5. Exterior of ventral valve from Locality 311c, Middle? Cambrian drift bowlder No. 7 on Biludden, 
Gefle Bay, Sweden. Specimen in the collection of the University of Upsala, Sweden; cast in the 
United States National Museum (Cat. No.57090a). Type specimen, figured by Wiman [1902, Pl. IT, 
fig. 30] as Lingulella sp. No. 1. 
5a. Exterior of ventral valve from Locality 311g, Middle? Cambrian drift bowlder No. 16 on Biludden, 
Gefle Bay, Sweden. Specimen in the collection of the University of Upsala, Sweden; cast in the 
United States National Museum (Cat. No. 57091a). Specimen figured by Wiman [1902, PI. II, fig. 
31] as Lingulella sp. No. 2. 
5b. Partly exfoliated dorsal valve from Locality 311t, Middle? Cambrian drift bowlder at Ofverby, Aland 
Island, Finland. Specimen in the collection of the University of Upsala, Sweden; cast in the United 
States National Museum (Cat. No. 57092a). Specimen figured by Wiman [1902, Pl. II, fig. 32] as 
y 
Lingulella sp. No. 7. 
Oxsotus (WESTONIA) ALANDENSIS Walcott (p. 451). 
Figure 6. Exterior of ventral valve from Locality 311j, Middle? Cambrian drift bowlder No. 28 on Biludden, 
Gefle Bay, Sweden. Specimen in the collection of the University of Upsala, Sweden; cast in the 
United States National Museum (Cat. No. 57093a). Specimen figured by Wiman [1902, Pl. II, fig. 
33] as Lingulella? sp. No. 3. : 
6a. Exterior of a dorsal valve from Locality 31ly, Middle? Cambrian drift bowlder at Ytternis, Aland Island, 
Finland. Specimen in the collection of the University of Upsala, Sweden; cast in the United States 
National Museum (Cat. No. 57094a). Type specimen, figured by Wiman [1902, Pl. II, fig. 35] as 
Lingulella? sp. No. 5. 
Oxsotus (WEsTONIA) BALTICUS Walcott (p. 453). 
Ficure 7. Partly exfoliated ventral valve from Locality 311t, Middle? Cambrian drift bowlder at Ofverby, Aland 
Island, Finland. Specimen in the collection of the University of Upsala, Sweden; cast in the United 
States National Museum (Cat. No. 57095a). Specimen figured by Wiman [1902, Pl. II, fig. 34] as 
Lingulella? sp. No. 6. 
7a. Dorsal valve from Locality 3110, Middle? Cambrian drift bowlder on Skalstenarne Island, Gefle Bay, 
Sweden. Specimen in the collection of the University of Upsala, Sweden; cast in the United States 
National Museum (Cat. No. 57096a). Specimen figured by Wiman [1902, PI. II, fig. 37]as Lingulella? 
sp. No. 4. 
7b. Dorsal valve from Locality 311h, Middle? Cambrian drift bowlder No. 26, on Biludden, Gefle Bay, 
Sweden. Specimen in the collection of the University of Upsala, Sweden; cast in the United States 
National Museum (Cat. No. 57097a). Type specimen, figured by Wiman [1902, Pl. IT, fig. 38] as 
Lingulella? sp. No. 4. 
