viii, a, 4 Smith: Fossil Invertebrate Fauna 291 



Prionastraea (?) vasta Klz. Plate XVII, fig. 4. 



Die Korallthiere des Rothen Meeres — Klunziger, PI. IV, fig. 8. 



This is not an especially good specimen on which to base any 

 comparisons, but most of our fossil corals are in no better con- 

 dition. I have referred this to the above species for the reason 

 that it looks more like the illustrations of this species than any 

 others which I had access to. I am inclined to question the 

 genus because of the arrangement of the septa, which should be 

 thin and closer together than are those in this specimen. 



Locality: Caracaran River, Batan Island, southeastern Luzon, 

 No. 2. 



Formation: Limestone. 



Hydroid zoophytes (?) Plate XIX, fig. 6. 



It is not clear just what these specimens are. An examination 

 by a specialist is needed definitely to identify these low forms 

 which are on the borderland between plants and animals. They 

 are abundant in the uppermost limestones of parts of Moun- 

 tain Province of Luzon. 



Locality : On the ridge west of Mount Mirador, Baguio, Moun- 

 tain Province, Luzon, No. 45. 



Formation: Pliocene (?) limestone. 



ECHINODERMATA 



ECHINOIDEA 



SPATANGIDiE 



SCHIZASTER Agassiz 



Periproct excentric, posterior ; ambulacra in unequal pairs, 

 the anterior pair strong and directed forward, somewhat bent 

 and nearer the groove of the unpaired ambulacrum, the latter 

 deep and grooved along the edges ; the double pores of the ante- 

 rior ambulacrum crowded and numerous. Principal develop- 

 ment in the Tertiary, seldom living. (Zittel.) 



Schizaster subrhomboidalis Herkl. Plate XIX, fig. 1. 

 Tertiarscht. auf Java (1880), Anhang 5. 



The specimen figured here, although not a perfect one, due to 

 some distortion and a hard encrusting matrix, answers in general 

 the description of this species, although I have not compared it 

 with any specimen or drawing. After the drawings for this 

 plate were completed several very perfect specimens of this 

 species were collected from the Miocene of Bondoc Peninsula, 



