40 VERRILL, SYNOPSIS OP 



nearly equal, the rest quite small, not projecting to one 

 fourth the height of the others. The large ones are narrow, 

 thickened, especially in the middle, concave on their inner 

 edges, obliquely truncate at top where they are slightly, and 

 irregularly denticulate. The outer edge is mostly nearly 

 straight and finely denticulate. Cells deep and without a 

 columella. 



Diameter of the largest cells .2 of an inch. Color of 

 coral light yellowish brown. 



Loo Choo Islands. Dr. Wm. Stimpson. 



FAMILY, TURBINOLID^E Edw. and Haime. 

 PARACYATHUS PORCELLANA Verrill, nov. 



Corallum low, smallest below the middle, slightly enlarg- 

 ing towards the top ; base broadly attached j calicle broad, 

 oval, deep, the edges most elevated in the transverse diam- 

 eter. Septa in four cycles with some belonging to the fifth 

 in part of the systems, the primaries considerably exsert, 

 with the other successively less so, all of them having the 

 sides strongly granulated ; inner edges of the principal ones 

 abruptly descending from the rounded ends. Columella 

 loosely papillose, formed by a few prominent, slender, styli- 

 form teeth ; pali numerous, the inner ones similar in appear- 

 ance to the columella, but all appearing as slender teeth 

 along the edges of the septa ; costae nearly equal, broad and 

 but little prominent ; the grooves between them fine but well 

 marked. External surface minutely granulated. 



Dredged at Hong Kong, China, attached to shells. Dr. 

 Wm. Stimpson. 



PARACYATHUS EBONENSIS Verrill, nov. 



Corallum broadly adherent with the base wider than the 

 cup, which is subcircular with a slight tendency to an hexag- 

 onal outline, moderately deep with a narrow central area. 

 Wall thin at summit, evenly costate, the costae low and thick- 

 ened, surface finely granulated ; towards the base there is a 

 thin epitheca, which rises within a tenth of an inch of the 



