viii, a, j Smith: Fossil Invertebrate Fauna 289 



ing, although it may have another name. Closely allied, but 

 smaller, forms have been found at over 1,500 meters' elevation at 

 Baguio, Luzon. 



Locality: Ilaga River, Batangas, No. 24. 



Formation: Miocene or Pliocene limestone. 



PACHYSERIS Edwards et Haime 



( Undaria) 



Stock attached, leafy; calices arranged in simple rows sepa- 

 rated by comb-like ridges, the rows completely coalescing; septa 

 fine, crowded together ; columella warty, well developed. Eocene, 

 Oligocene, and Recent. (Zittel.) 



Pachyseris cristata K. Mart. ( ?) Plate XVIII, fig. 9. 

 Tertiarscht. auf Java (1880), 145, PI. XXVI, fig. 8. 



This is more like P. cristata than any other of the Javan species 

 with which I have compared it. The Philippine specimens show 

 much more irregularity in the ridges, and the septa appear to be 

 somewhat finer. 



Locality: Barrio Mesaba, Danao, Cebu, No. 272. 



Formation: Miocene limestone. 



PTYCHOCYATHUS (?) 

 Ptychocyathus ( ?) incognitus sp. nov. Plate XVIII, fig. 10. 



In this specimen, the stock consists of two long calices joined 

 by the coalescing of the epitheca of the walls. The calices are 

 circular in section. At the top they measure in diameter about 

 2 centimeters, and they taper almost to a point. The walls are 

 about 3 millimeters in thickness, and strongly corrugated with 

 deep V-shaped grooves which run the length of the corallite. 

 Length of the specimen 7 centimeters. Nothing of the internal 

 structure can be made out as it is filled with recrystallized 

 calcium carbonate. 



Locality : Unknown. Spanish collection. 



Formation: Limestone. 



SPONGLE 



LITHISTID.E 



CHENEND0P0RA Lamouroux 



Beaker, funnel or cup shaped, thick walled, generally with 

 stem; inner side with small sunken osculis from which simple, 

 generally bent, canals penetrate deeply the thick wall. The 

 canals take a more downward inclination, and extend as vertical 



