Il6 OLAF HOLTEDAHL. M.-N. Kl. 



Page 

 Fig. 6. Strophoinena ? costatula H. and C. Free specimen from the dorsal 



side. — 6, Spirebugten, Asker. Coll. konservator Jensen 63 

 » n_ — Free specimen. — 6 a, Høierholmen, Asker. Coll. J. Kiær 63 



» 8. Strophomena sp. Ventral valve. — 6 c, Malmø, Bundefjord. Coll. 



J. Kiær 63 



» 9. Leptaeua Kjerulfi n. sp. Interior of dorsal valve with a portion 



of the ventral valve preserved. — 4 b ^, Gaasø, Bærum. 



Coll. Th. Kjerulf? 72 



» 10. — A worn dorsal valve, seen from the inside. — 4 b (S, 



Snarøsund, Bærum. Coll. on excursion with students 72 

 » II. — A fragment of a ventral valve showing radiating striae 



of two different sizes. -4b 1^, South of Volden, Asker. 



Coll. O. Holtedahl 72 



» 12. Leptaeua undata M'Coy (?}. Ventral valve. — 5 a, Furuberget, 



Mjøsen district. Coll. J. Kiær 75 



Plate XIV. 



Fio-. I . Plcctauibonites sericea Sow. Two dorsal valves and a ventral with 



worn surface, X 2. — 5 a, upper part. Vestre Svartø, 



Ringerike. Coll. J. Kiær 81 



» 2. — Internal moulds of ventral valves and external moulds 



of dorsal valves. — 5 a, Stavsberget, Helgø, Mjøsen 



district. Coll. J. Kiær 81 



» 3. — Internal moulds of dorsal valves. — 5a, Bergviken, Helgø, 



Mjøsen district. Coll. O. Holtedahl 81 



» 4. Phrtniiibonifes sericea Sow. var. rhoinbka M'Cov. Ventral valve. 



— 4 c, upper part, railrood section Roa — ^Grindvoll, 



Hadeland. ' Coll. O. Hohedahl 80 



» 5. External mould of dorsal valve X 2. — Rather small, 



serkea-XiV^ specimen. Hor., loc , and coll. as preceding 80 

 » 6. Pkctambonites trabeata Ldstr. var. acumumta n. var. Internal, 



mould of ventral valves. — 4 b, City of Kristiania. 



Coll. unknown 79 



■ — External mould of dorsal valve. Hor. and loc. like preceding 79 

 Pkctambonites sp. Ventral valve. — 4 b a. Delebugten, Asker. 



Coll. J. Kiær 80 



» 9. Plectambonites convexa Pand. Ventral valve. — 4 b, low. part, 



Skjælbugten, Frierfjord, Skien — Langesund district. Coll. 



W. C. Brøgger 78 



XV. 



Fig. I. Pkctambonites transversaIisY)x\M. Smaller type. — 6, Malmø, Bunde- 

 fjord Coll. unknown 83 



» 2. — Larger type — 6 b, Malmø, Bundefjord. Coll, J. Kiær 83 



» 3. — Specimen with shell substance removed by acid. Hor., 



loc, and coll. as preceding 83 



» 4. — External mould of dorsal valve. — Hor, and loc. as prec. 



Coll. Prof. Wille 83 



» 5. Plectambomtes scissa Salter var. triangularis n. var. Internal mould 

 of ventral valve. — 6 c, Railroad section near Asker, 

 Asker. Coll. J. Kiær 84 



» 6. — Internal mould of a ventral and external mould of dorsal 



valve. From the same slab as preceding 84 



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