I4O NEW YORK STATE MUSEUM 





■ 





J 



/ 





¥ • 



r* 



v 







,' 













•-■•■■ V 





Fig. 33 Diplophyllum caespitosum with longitudinal and transverse sections 



Found in the lower part of the Lockport limestone series at Lock- 

 port, and may also occur at Niagara. 



Genus favosites Lamarck 



[Ety. : favns, honeycomb] 



(1816. Hist, des anim. sans vert. 2 1204) 



Corallum massive, more rarely branching, commonly forming 

 heads which may be a foot or more in diameter. Corallites pris- 

 matic, thin, in contact but not amalgamated by their walls, which are 

 perforated by equidistant mural pores in one or more rows. Septa 

 rudimentary or obsolete. Numerous more or less regular tabulae 

 divide the intrathecal space. Peritheca present on the under side 

 of the colony, and usually strongly wrinkled. 



Favosites venustus (Hall) 1 (Fig. 34). Astrocerium venus- 

 tum Hall (1852. Pal. N. Y. 2:120, pi. 34) 



Distinguishing characters. Hemispheric or spheroidal form, be- 

 ginning growth on other bodies; small corallites increasing in num- 

 ber by interstitial addition; 12 ascending septal spines between 

 tabulae; corallites from .9 to 1 mm in diameter; heads often up to- 

 2 or 3 feet in diameter. 



1 These species are regarded by Whiteaves and Lambe as synonyms of 

 Favosites hisingeri E. and H. 



