Locality. Isle La Motte, Vt. Rocky ridge Goodell's pasture. 

 In connection with S. Eatofti iwuX accompanying fossils, there is 

 a form very different from these associated ones, and especially 

 noticeable in its general character and structure. It occurs mostly 

 as worn nodules of two to six inches across, is tlark or purplish 

 in color, and banded in structure, these bands resembling the grain 

 of wood. It approaches 6". rugosiun in size and if the lamina- 

 tions were corrugated it would appear very closely related to Stro- 

 matoceritim. But the wavy or rugose structure is wanting. Nor 

 do the magnified sections correspond to Stromatoceriiiin. 



The structnre, however, both microscopic and macroscopic, 

 does approach that of the genus Cryptozoon^ while its purple 

 color and its bands correspond to the first recognized, though not 

 the first named species of the genus. Such a fossil is found in the 

 Beekmantown rocks at Shoreham, Vt., and is specifically named 

 from the first observer, Cryptozoon Steeli. This Upper Chazy 

 form were it down in the Beekmantown, might easily be referred 

 to the genus Cryptozoon. That it may have a place until its 

 nearer i-elationships are determined, it may be provisionally left 

 with the Cryptozoon as here named. 



Cryptozoon ? Perkixsi n. sp. 



A nodular calcareous fossil of dark or purple color having the 

 general banded character and microscopic structure of the genus 

 Cryptozoon. 



Horizon. C. Chazy. 



Locality, Isle La Motte, Vt. 



Interesting questions concerning the genus Stromtoceritim 

 easy to ask, arise here. Among the inquiries would naturally be 

 the following : the character of the animal producing the calcar- 

 eous masses, its mode of growth, its manner of propagation, its 

 ancestry, its relationship with other forms. 



At this far away time with the changed material at hand, it is 

 doubtful if these questions can be answered in a wholly satisfac- 

 tory way. Yet some considerations and, perhaps, some helpful 

 facts may be presented. 



The solitary silicilied form .S'. rngosuvi so well characterized as 



