188 



that the anterior border of the shell is somewhat drawn upwards 

 in the direction of the hinge-line and is not «nach der Bauch- 

 seite vorspringend» as Moesch indicates. In this respect the 

 Greenland specimen agrees better with Sowerbt's figure quoted 

 above. The palliai border is somewhat curved, but the hinge- 

 line is almost straight. The area is not preserved. The number 

 of ribs is 13. 



Pholadomya angustata occurs, ^according to Moesch, in the 

 Sowerbyi-zone, through the Cornbrash up to the Callovian. 

 Fox-Strangways ^) gives it as occurring doubtfully in the Grey 

 Limestone, also in the Cornbrash, Lower Calcareous Grit and 

 Lower Limestone of Yorkshire. Woodward ^) quotes it from the 

 Oxford Clay of Dorsetshire. 



Tn addition to the specimens described above, a number of 

 shell-fragments and casts of Lamellibranchs have been found in 

 various localities. Lfortunately it has been impossible to de- 

 termine any of these. They are mentioned on pages 198 — 203. 



Gastropoda. 



A few fragments of Gastropod-casts, partially covered with 

 the shell, have been found in the brown calcareous sandstone 

 of Mount Nathorst and in the very micaceous clay-shale of 

 Vardeklöft, 550 — 880 metres above sea-level. These specimens 

 are, unfortunately, so badly preserved that they cannot be 

 determined. 



M Fox-Stang\vays, с 1892, p. 168 and 223. 

 =) Woodward, H. B. 1895, p. 381. 



