THE 



AMERICAN 



JOURNAL OF SCIENCE AND ARTS. 



[SECOND SERIES.] 



Art. I. — Notice of Microscopic Forms found in the soundings of the 

 Sea of Kamtschatka — with a plate ; by Prof. J. W. Bailey. 



In the American Journal of Science, vol. xxi, p. 284 an 

 account was given of some of the results of the microscopic 

 examination of the soundings obtained in the sea of Kamtschatka, 

 by Lieut. Brooke of the IT. S. Navy. These soundings which 

 ranged from 900 fathoms to 2700 fathoms in depth are, as was 

 stated (1. c. p. 284), very rich in the siliceous remains of Diatoms, 

 Polycistins, and Spongiolites, but have yielded no traces of the 

 calcareous shells of the Polythalamia. A perfect agreement was 

 also found to exist in the nature of their organic contents, almost 

 every species noticed having been found, and in about equal 

 abundance, in each of the soundings. The only difference no- 

 ticed was in the proportion of the mineral matter, which was 

 least in the deepest soundings. 



The organic contents of the above mentioned soundings as far 

 as they have been determined are given in the following list. 

 The species distinguished by a star are believed to be new and 

 are described in the subsequent pages. 



List of Organic Forms found in the soundings of the Sea of Kamtschatka. 



DiATOMACEAE. 



Actiniscus Sirius, Ehr. Denticella aurita Ehr., fig. 26 to 28. 



*Asteromphalus Brookei B., fig. 1. Dicladia Mitra B., fig. 6. 

 *Chaetoceros furcillatum B., fig. 4. Dictyocha Speculum Ehr. 

 *Coscinodiscus borealis B. *Dictyopyxis cruciata Ehr. 



* " crassus B. Gallionella sulcata Ehr. 



SECOND SERIES, VOL. XXII, NO. 64. JULY, 1856. 1 



