NATURAL HISTORY OF THE DIATOMACEiE. 503 



tions. Besides the specimen sent me by Mr. Stockier, I received further supplies from 

 Mr. R. C. Greenleaf, of Boston, in 1866, and from the discoverer and owner of the 

 deposit, Dr. S. A. Bemis, in 1865 and 1870. 



Bowkerville. The first specimens of this deposit which I received were from your- 

 self, in May, 1871. In the following July I visited the locality with you, and made 

 further collections. 



Stamp Act Island. This deposit I received from you in September, 1871. 



Littleton. The first samples of this deposit were procured from the Bailey collection 

 in the possession of the Boston Society of Natural History, and were sent me by Mr. 

 Charles Stockier. Subsequently specimens were sent to the survey by Mr. B. W. 

 Kilburn, and were transmitted by you to me. 



Laconia. The first specimens of this I received from Mr. R. C. Greenleaf, in 

 November, 1865. In May, 1867, he sent me a further supply, and told me that it 

 occurred on a farm belonging to Col. Crockett. 



Bristol. This was sent to me by Mr. C. Stodder, June, 1862, who said that he had 

 received it from a Mr. Webster. 



Chalk Pond, Newbury. A very small sample of this deposit was sent to me by you, 

 October, 1871 ; and in June, 1874, you sent me a further supply. 



Epsom. This I procured from the collection of the Essex Institute, Salem, Mass., 

 in December, 1864. 



Pike's Pond. This was discovered, I understand, by Mr. J. H. Huntington, of the 

 survey, and was given me by you, June, 1871. 



Boiv. This I also procured from the collection of the Essex Institute, and it was 

 labelled as having been presented by Dr. Prescott. 



Cold Pond, near Crawford House. A very small sample of this was sent me by you, 

 July, 1872. 



Concord. This I procured from the Bailey collection in Boston. 



Umbagog Lake. This you sent me in July, 1870. 



The slides labelled Manchester, IV. H., and Durham, IV. H., I received from Mr. 

 E. Samuels, of Boston, Mass. 



The recent gatherings of diatomaceae which I have from New Hampshire, are as 

 follows : 



No. 1. Brook emptying into Shaker pond, Enfield. 



No. 2. "Muck hole," Hanover. 



No. 3. On mosses from Shaker pond, Enfield. 



No. 4. Mink brook, Hanover. 



No. 5. Trout pond on farm of J. E. Lawrence, Bowkerville. 



No. 6. Lake of the Clouds, on Mt. Washington. 



No. 7. Haystack lake. 



No. 8. Large pond, Bowkerville. 



Nos. 9, 10, 11. Hanover. 



