Verrill.] 394 [April 7, 



are considerably broader than the others, broadly rounded and some- 

 what exsert at summit, narrowed toward the base and divided into 

 two or three unequal, broad, stout, paliform lobes, which are rough 

 and lacerately s^jinulose at summit, and covered on the sides with 

 coarse rough granulations. The septa of the succeeding cycles are 

 successively narrower, thinner, and less exsert, with similar but 

 smaller, rough, paliform teeth. Columella small, papillose, the 

 papilla? slender, prominent, lacerately spiuulose at summit. 



Height .60; diameter of narrowest part .38 by .50; diameter of 

 cup .50 by .72; depth of cup .25. 



Monterey, California; Robert E. C. Stearns. 



Paracyathus Caltha Verrill, sp. nov. 



Corallum turbinate, with an expanding base; pedicel about one 

 half the width of the summit. Cup elliptical with flattened sides, 

 the ratio of the axes as 100:140; the summit of the longer axis 

 somewhat lower than that of the shorter. Septa in five regular cycles ; 

 those of the first and second subequal, rather broad and stout, thick- 

 ened uniformly, rounded at the summits, •pi-ojecting about .02 inch, 

 finely granulated on the sides. The other sejjta diminish regularly in 

 width and height, equidistant, the last thin and narrow. Columella 

 formed by numerous stout, styliform processes, rounded at tip, not 

 crowded. The pali are similar in size, but more prominent and flat- 

 tened, increasing in width and height as the septa diminish, their 

 inner edges denticulate. They are present before all the septa except 

 those of the fifth cycle. Costae of all the septa prominent near the 

 margin of the cup and dentate ; below represented only hy lines of 

 granules. 



Height of largest specimen .6 inch; greatest diameter .45. 



Monterey, Cal. ; J. Xantus. (From Smithsonian Inst.) 



Pavonia gigantea Verrill, nov. sp. 



Corallum very large, thick, encrusting, near the edges often some- 

 what free ; upper surface nearly flat or variously undulated and 

 uneven, covered with large, distant, stellate cells, which are either 

 irregularly scattered, or sometimes in somewhat regular rows for a 

 short distance, and in the latter case contiguous laterally, but the 

 rows are separated by spaces equal to once or twice the diameter of 

 the cells, which are united by very prominent septo-costal lamellae. 

 Septa in the largest cells usually twenty-four, in three regular cycles, 

 often twelve, sometimes only eight or ten, and frequently in irregular 

 numbers between twelve and twenty-six, but in all cases they are 



