INFUSORIA. 



173 



FIG. 90. 

 . I 



Gomphonema 



acuminatura. 



FIG. 94. 



Eunotia monodon. 



FIG. 91. 



Cocconema cymbiformc. 



FIG. 92. 



Spoil gilla lacustris. 



Fw. 93. 



Spongilla erinaceus. 



Some of the specimens from Peacham were sent to the late Professor J. W. Bailey, of West Point, New 

 York, who made the following remarks concerning them : 



" West Point, N. T., Jan. 26, 1846. 

 Prof. C. B. ADAMS : 



My Dear Sir, The specimen which you sent me for examination, from Peacham, Vt., proves 

 to be, as you supposed, a mass of infusorial matter. It presents all the usual characters of the deposits now 

 well known to exist under almost every peat bog in the country. It is chiefly remarkable for abounding in 

 very perfect carapaces of that beautiful animalcule Surirella splendida, of Ehrenberg, [Fig. 80.] Among 

 the other forms which I recognized, are the following : 



Pinnularia viridis, 



Suecica, 



Eunotia tetraodon, 

 " decaodon, 

 Tabellaria trinodis, 

 Gaillionella varians, 

 " distans, 

 Himantidium arcus, 

 Stauroneis Baileyi, 

 Gomphonema acuminatum, Ehr. 

 Cocconema cymbiforme, 

 Spongilla lacustris, 

 " erinaceus, 



" There are many other species present for which the names cannot be determined until we receive 

 Ehrenberg's forthcoming work, in which all the known species are to be figured and described." 



In Maidstone there is another deposit of infusorial silica, concerning which Prof. Bailey made the follow- 

 ing remarks : 



" West Point, Feb. 16, 1846. 

 Prof. C. B. ADAMS : 



My Dear Sir, Your interesting letter with its inclosed specimens came safely to hand, and I 

 have given them a somewhat hasty examination, which has afforded the following results. 



"The most interesting specimen in the infusorial marl from Maidstone, although not so white as many in- 

 fusorial deposits, it is almost wholly composed of shields of animalcules, and is quite free from sand or 

 other inorganic matter. The principal species present are these, many of which are almost ubiquitous, viz : 



Pinnularia viridis, 

 " viridula, 

 " pachyptera, 



Stauroneis Baileyi 



Synedra ulna, 



Himantidium arcus, 



Ehr. 

 Ehr. 

 Ehr. 

 Ehr. 



Ehr. 



abundant. 



Fig. 81 



rare. 



Fig. 89 



Fig. 88 



Gomphonema acuminatum, rare in this specimen. Fig. 90 

 Eunotia monodon, etc. see Fig. 94 



