DEScRiPTioys OF Devoman Fossils. 231 



Formation and local tty. In limestones of the age of the IT})per 

 Ilelderberg of New York, at "Waterloo, Iowa. 



Cladopoka palm at a n. sp. 



Plate 10, flg. 1. 



Coral growing in broad, spreading, frondose or palmate branches, 

 two or three inches in width ; with or without frequent, irregular 

 projections from their surface ; cells sinuate with narrow, salient 

 division walls, closely arranged, live to seven within the space of a fifth 

 of an inch, and often much more crowded in irregular patches ; aper- 

 tures directed obliquely upward and slightly transverse, but varying 

 in size and form according to the character of the frond, beino; recrular 

 on regular fronds and variable in irregular specimens ; communicating 

 pores distant. 



This species has much the appearance of thin fronds of Alveolites 

 when seen in detached fragments showing only one surface, especially 

 in the form of the cell apertures. The cells are, however, destitute of' 

 transverse partitions, and the communicating pores are very distinct,, 

 while both surfaces of the frond are alike celluliferons, which is not a 

 character in any species showing the transverse partitions, so far as 

 observed. 



Formation and locality. In the limestone at Waterloo, Iowa. 



Genus — ZAPHRENTIS Raf. & Clif. 

 Zapiieentis solida n. sj). 



Plate 9, flg. 5. 



Coral turbinate, broadly spreading ; cup deep, broad at bottom, with 

 abruptly ascending sides ; fosset not strongly marked, septa rather 

 strong, denticulate on the edge, about thirty in the primary series ; 

 secondary series very much smaller, barely extending to the base of 

 the cup. Transverse tabultB distinct, often closely arranged, extend- 

 ing half the diameter of the cup ; vesicular portion very narrow and 

 very dense, scarcely showing the minute cysts. Epitheca sliglit, 

 usually contiguous. 



This species is peculiar, from the strong lamellae and the very solid 

 texture of the outer portion of the cup. 



Formation and locality. In the marly beds at Rockford, Iowa. 



Genus — PACHYPHYLLUM Ed. & Haime. 



, PACHYPHYLLUil WoODMA^^. 



Plate 9, flg. 9. i 



{Smithia Woodmani White, Geol. Rejp Iowa., 1870, vol. 1, p. 188.) 

 Coral growing in irregular convex or hemispheric masses from one 

 inch to six inches in diameter. Cell-walls sti'ongly exsert, often pro- 



