PLATE XXIX. 



Prodiictus Wallaciaiius Derby, p. 583. — Boulder, Eskimo 

 Naze {N:o 213). 

 Fig. 1. Specimen I. Ventral view of the ventral valve. 



— 2. — Lateral — - - — — 



— 3. Specimen II. Cast of dorsal valve. 



— 4. — The same, lateral view. 



Prodiictus punctatns Martin p. 585. — Amdrup's Land, West- 

 ern river (N:o 160). 



— 5. Dorsal valve. 



Productus pseudohorridus Wiman p. 586. — Boulder, Eskimo 

 Naze {N:o 197). 



— 6. Posterior view of entire specimen. 



— 7. Anterior — - — — 



— 8. Lateral —, - — — 



— 9. Dorsal — - — — 



— 10. Dorsal valve seen from the interior. 



Productus timanicus Stuck, p. 586. — Boulder, Mallemuk- 



fjæld {N:o 154-). 

 Specimen I. A very young individual. 



— П. Ventral view. 



— 12. Lateral — 



— 13. Showing the beak and the hinge-line. 



Specimen II. An older, but yet not adult individual. 



— 14. Ventral view. 



— 15. Lateral — 



— 16. Anterior — 



Productus inflatus M'Chesn. p. 578. — The Cape Jungersen 

 Section {N:o 128). 



— 17. Ventral view. 



— 18. Lateral — 



— 19. Dorsal — 



