13 



21. Aorta. Atheroma. 



22. Intestine. Typhoid ulceration. 



23. Neck. Malignant tumour. 



24. Perinseum. Vascular tumour. 



52. Miscroscopic objects, including diatomaceas, fora- 

 minifera, radiolaria, &c. Grouped and selected. On 

 plain and opal glass. In a frame. 



Exhibited by A. C. Cole. Prices from Is. 6d. to 4s. 6d. each. 



1868. 



53. Collection of 13 various microscopic objects for 

 elementary instruction in the use of the instrument. 



Exhibited by F. Pastorelli tf Co. 1860. 



54 . Collection of microscopic preparations chiefly of 

 the nervous system of various species of Mollusca. 



Presented by Dr. Ph. Ovsiannikov, University of St. 

 E. 490. 1877. Petersburg. 



1. Central nervous system of Thetis mounted whole. 



2, 3. Sections of the same. 



4. Central nervous system of jEolis. 



5, 6. Gastropteron. 



7. Bulla, showing the pigmented 



eyes. 



8. Umbrella. 



.9. Pleurobranchus. 



10. Section of a nerve-ganglion of Aplustrum. 



11. Central nervous system of Aplysia. 



12. Section of the electric organ of a Ray. Made from a 

 specimen preserved for three years in spirit, the cells and fibres 

 are still seen very well. 



13. Central nervous system of Dentalium. 



55. Microscopic preparations of typical botanical ob- 

 jects arranged in series to illustrate : 



a. Physiological anatomy of plants. 



b. Comparative anatomy of plants. 



c. Classification or special morphology of plants. 



d. Life history of plants. 



E. 24. 1891. Prepared by Martin /. Cole. 



H. REAGENTS FOR MICROSCOPIC WORE. 



56. Set of the more commonly used reagents : 



Iodine green, Is. 

 Borax carmine, Wd. 



o 67086. B 



