PLATE IL 
1. The body of Syringosphceria tuberculata, Duncan. Natural size. 
2. A portion magnified, showing the tuhulation on the surface of the body and monticules, 
and a few pores. 
3. The body of Syringosphceria porosa, Duncan, shown in outline, with a portion indicating 
the numerous pores. Natural size. 
4. A portion magnified, showing numerous round pores with canal openings and the inter¬ 
mediate surface with indistinct tuhulation. 
5. The body of Stoliczkaria granulata, Duncan, shown in outline. The upper portion of 
details is of the size of nature, and indicates the numerous irregularly disposed granula¬ 
tions. The lower portion is in part magnified to show the numerous granulations, the 
tube openings on their top and their radiating tuhulation on their sides and in the 
intervening space. 
6. The body of SgringospJiceria monticularia, Duncan, variety aspera. Natural size. 
7. A portion magnified, showing the openings of tubes on the monticules and the other 
tuhulation., the black lines being interspaces between stout, crooked tubes. 
