218 EXTRACTS AND ABSTRACTS FROM FOREIGN JOURNALS. 



3. Dentalina aculeata.D'Orb. p. 13. PI. I, figs. 2, 3. Length, 3 



millim. 



4. Marginulina trilobata. D'Orb. p. 16. PL I, figs. 16, 17. Length, 



2 to 3 millim. (Found only in a young state.) 



5. Cristellaria rotulata. D'Orb. Lenticulites rotulata. Lam. 1804. 



Diameter, 2 millim. 



6. Rotalina Voltziana. D'Orb. p. 31. PL II, figs. 32, 33, 34. Dia- 



meter, |- millim. 



7. Micheliniana. D'Orb. p. 31. PL III, figs. 1,2, 3. 



8. umbillcata. D'Orb. p. 32. PL III, figs. 4, 5, 6. Diameter, 



Y millim. 



9. crassa. D'Orb. p. 32. PL III, figs. 7, 8. Diameter, 1 



millim. 



10. Cordieriana. D'Orb. p. 33. PL III, figs. 9, 10, 11. 



11. Globigerina cretacea. D'Orb. p. 34. PL III. figs. 12, 13, 14. Dia- 



meter, i millim. 



12. elevata. D'Orb. p. 34. PL III, figs. 15, 16. Diameter, 



% millim. 



13. Truncatulina Beaumontiana.Wib. p. 35. PL III, figs. 17, 18, 19. 



Diameter, \ millim. 



14. Rosalina Lorneiana. D'Orb. p. 36. PL III, figs. 20, 21, 22. Dia- 



meter, \ millim. 



15. Clementiana D'Orb. p. 36. PL III, figs. 23, 24, 25. Dia- 



meter, i millim. 



16. Bulimina variabilis. D'Orb. p. 40. PL IV, figs. 9, 10, 11, 12. 



Length, 1 millim. 



17. obtusa. D'Orb. p. 39. PL IV, figs. 3, 6. Length, |millim. 



18. obliqua. D'Orb. p. 40. PL IV. figs. 7. 8. Length, 1 millim. 



19. Murchisoniana. D'Orb. p. 41. PL IV, figs. 15, 16. Length, 



-| millim. 



20. Gaudryina pupoides. D'Orb. p. 44. PL IV, figs. 22, 23, 24. 



1 millim. 



21. Textularia turns. D'Orb. p. 46. PL IV, figs. 27, 28. Length, 1*- 



millim. 



22. Lituola Nautiloidea. Lam. D'Orb. p. 29. PL II, figs. 28, 29, 30, 31. 



PROCEEDINGS OF THE MICROSCOPICAL SOCIETY OF LONDON. 



July 20th, 1842. /. S. Bowerbank, Esq., in the Chair. 



AT the meeting of this Society a paper was read by Mr. John Quekett, 

 " On the peculiar arrangement of the Blood-vessels in the Air-bladder 

 of Fishes, and on the evidence they afford of the true function of that 

 organ." The author, after alluding to three principal modifications of 



