Protethmos gregorii sp. nov. 
PI. , fig. 
Corallum trochoid, "base small, calice broadly elliptical. 
Greater diameter of calice, 21 mm.; lesser, 17 mm.; height, 17.5 
mm. 
Specimen worn, details of the wall therefore not definite- 
ly det erminable . It appears to be very largely synapt iculate , 
with pit3 and some perf orations . Broad, low costae correspond- 
ing to all septa. 
Septa distant, in four complete cycles, primaries and 
secondaries thick, of equal or nearly equal size; outer ends of 
tertiaries thiok, but thinner and shorter than the first two 
cycles; quaternaries shorter and thinner than the tertiaries. 
The primaries and secondaries are imperforate; tertiaries and 
quaternaries quite often disconnected in their inner portions. 
Septal faces but slightly granulate. Synapticula present, 
dissepiments appear to be well developed, occurring in the 
peripheral portion of the interseptal loculi 
