OF TILGATE FOREST. 
m) 
what the illustrious and lamented Cuvier has 
so successfully achieved in the zoology, of the 
ancient world. 
FOSSIL FERNS FROM HEATHFIELD. 
1. Sphenopteris Sillimani. 
2. Sphenopteris Phillipsii. 
Sphenopferis Sillimani. — In ferruginous cal- 
ciferous grit. I have seen but the specimen here 
figured of this delicate fossil fern ; it is from a 
quarry in the parish of Heathfield, where imper- 
fect traces of vegetables are abundant. The spe- 
cific name is in honour of that eminent philosopher 
and geologist, Dr. Silliman, Professor of Chemistry 
and Mineralogy in Yale College, Newhaven, Con- 
necticut, Editor of the American Journal of 
Science ; a man alike respected for his high 
scientific attainments, and beloved for his private 
virtues. 
Phillips’s Yorkshire, Plate vii. fig. 18. 
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