448 Thirty-fifth Report on the State Museum. 



calix ; inter-lamellar cysts very prominent, frequently obscuring the 

 lamellae, near the margin the lamellae sometimes becoming obsolete. 

 , Formation and locality. Corniferous limestone, near Leroy, New 

 York. 



BLOTHROPHYLLUM, Billings. 



Blothrophyllum multicalicatum, n. sp. 



Corallum simple, elongate turbinate or sub-cylindrical ; exterior 

 with numerous abrupt constrictions caused by intermittent growth, 

 and sharp annulations bearing quite prominent spinules ; external 

 costae distinct; diameter of central axis 25 mm., of tabulae 15 mm.; 

 calix 40 mm. wide ; for a space of 10 mm. from the margin the sides 

 are flat, then vertical, a space at the bottom 20 mm. in diameter flat 

 smooth, elevated ; number of lamellae 120, alternating in size, the 

 larger ones extending to the margin of the elevated tabulae at the bot- 

 tom of the cup ; interlamellar cysts elongate, conspicuous, frequently 

 partially obscuring the lamellae. This species may be distinguished 

 from B. decortication by the different form of the calix, finer and less 

 conspicuous lamellae, and more compact arrangement of the expanded 

 calix margins. 



Formation and locality. Corniferous limestone, Canada West. 



Blothrophyllum papulosum, n. sp. 

 Corallum simple, sub-cylindrical, consisting of numerous invagi- 

 nated calices, each of which is formed of thin, superimposed laminae 

 exterior with numerous distinct, concentric striae, of which there are 

 about 30 in the space of 5 mm., frequently arching on the external 

 costae, which are very prominent. The largest fragment observed has 

 a length of 170 mm. and a nearly uniform diameter of 50 mm.; diam- 

 eter of central axis 25 mm.; calix, shallow, campanulate, a space at 

 the bottom from 10 to 15 mm. in diameter, flat, smooth ; number of 

 lamellae from 90 to 100, which are nearly uniform in size near the 

 margin of the cup, flattened, broad, alternating in size and be- 

 coming thin as they approach the center ; principal lamellae extending 

 to the flat area at the bottom. On the thickened lamellae, 

 toward the margin, are numerous prominent pustules. This 

 species may be distinguished from B. decortication as fol- 

 lows: the expanded calix margins are much more numerous, more 

 compact and more distinctly consist of thin, superimposed laminae ; 

 the lamellae toward the margin are broad, flattened, and with very 

 prominent pustules ; the epitheca is never continuous over ths whole 

 length of the corallum. 

 * Formation and locality. Corniferous limestone, Leroy, New York. 



