1915- ^- l^ THE STROPHOMENIDAE OF THE KRISTIANIA REGION. II5 



Fage 



Fig. 3. Schtirhertella ptclai Dalm. Relatively long, subtriangular ventral 

 valve of the large type of 8 c, seen from the inside. 

 8 c, Malmo, Bundetjord. Coll, Th. Kjerulf»?' 67 



14. — Relatively long ventral valve. — 8 c, Nfalmø. Coll. J. Kiær 



35 — Relatively broad specimen, seen from dorsal side. Hor., 



loc, and coll, as preceding 67 



» 6. — Fragmentary' free specimen. Hor. and loc, as preceding. 



Coll. Th. Kjerulf 67 



; 7. — Dorsal valve with shell substance removed in posterior 

 portion, lowing ca\ities corresponding to branches of 

 cardinal process and crura! plates. — Hor, loc, and 

 coll. as fig, 4 67 



Plate XII. 



Fig. I. Leptaetta rhomboidal i < Wilck. \entral valve of convex, slightlv 



corrugated type. — 9 a, Bragso, Ringerike. Coll J. Kiær - 1 



•> 2. — Ventral valve of large form with convex central disc. 



The muscular scars may be larger than it looks in the 

 photograph. — 8 c, Malmo, Bundetjord. Coll, J. Kiær 70 



» 3. — Ventral valve with large expanded wings. — 6, Malmø- 



kalven. Bundefjord. Coll. unknown 70 



34. — Internal mould of a subtriangular specimen. — 4 b 



. Coelosphæridiumzone Fangberget, Veldre, Mjosen district. 

 Coll. O. Holtedahl ^ ." 69 



35. — Internal mould of a large specimen, typical of the zone 



8 c in tlie Bundetjord district. — 8 c, Malmø. Coll. J. Kiær 70 

 * 6. — Ventral valve of a broad specimen, with acute cardinal 



angles. — 4 b, Bratterud. Ringerike. Coll. J. Kiær, , . 69 



> 7. — Ventral valve with central disc bordered by a distinctly 



elevated margin. — 6, Ulvo, Bundetjord. Coll. J. Kiær 70 

 '8. — Small ventral valve. — 4 b d, near Braaten, Asker. 



Coll. J. Kiær 69 



s 9. — External mould of dorsal valve. — Hor., loc, and coll. 



like fig. I -I 



- to. — Interior of dorsal valve. — 8, Langø off Holmestrand. 



Coll. W. C. Brøgger -o 



» II- — Comparatively long and narrow ventral valve. — ^ 8 c, 



Ormo, Bundetjord. Coll. on excursion with students . . 70 



- 12. — Ventral valve of the same tj-pe and trom the same 



hor. and loc. as fig. i. Coll. j, Kiær 71 



Plate XIII. 



Fig. T. Ltptaena ci. umcoitata M. and \V. Ventral valve. — 4 c, Railrood- 



section near Flatia. Hadeland. Coll. O. Holtedahl .... 73 



> 2. Lfptaena sp. cf. utticostata ? . — 4 b, low. part, Gravestranden, 



Friertjord, Skien — Langesund district. Coll. W. C. Brøgger 74 

 ■> 3. Stropltomena Scoßfldi W. and S?. Dorsal valve. — 4 b, upp. part. 



South of Roikenvik, Hadeland. Coll. O. Holtedahl ... 61 

 = 4. Strophomena sp. Fragmentary free specimen. — 4 c, South of 



Roikenvik, Hadeland. Coll. O. Holtedahl 61 



> 5. Strophomina Lovnti Verx. Free specimen. 8 c or d\ Malmø, 



Bundetjord. Coll. unknown 60 



