Verrill, Notes on Radiata. 531 



tered, small, rough granules ; primMries a little broader and more 

 exsert than the others ; tertiaries curved toward and mostly united to 

 the secondaries, about midway between the margin and center. 

 Summit of the walls between the calicles thin, rough with the project- 

 ing ends of the septa. The young corallites arise chiefly by budding 

 between the angles of the older cells, both in the central parts and 

 around the margin, where the calicles are oblique and strongly ap- 

 pressed to the surface. 



The larger specimens are about three inches across ; thickness vary- 

 ing from -15 to '30 of an inch; diameter of the largest calicles about 

 •20 ; depth -08 to '12. 



Gulf of California, — J. Pedersen ; Guaymas on dead shells of 

 Stroiuhus gracilior, etc , — Dr. E. Palmer (Chicago Acad. Science). 



This species is more nearly allied to A. Marylandica and .4. hella 

 than to any known living species. The former differs, however, in 

 having but 12 distinct septa and very wide interseptal chambers; the 

 walls are thicker; the septa have smaller lateral granules and more 

 regular teeth ; and the columella is less developed. The mode of 

 growth and union of the corallites is the same. A. hella has the same 

 number of septa (24), but those of the diffei*ent cycles are quite 

 unequal. It also has considerable resemblance to A. Dance, and A. 

 astradformis of the Atlantic coast of the United States, but these 

 have papillose columella? and usually 36 septa, which are closer to- 

 gether, not so strongly granulous, and more evenly toothed, while 

 the calicles are more circular and the corallites are generally free 

 laterally, to some extent, and mostly rise above the intervening sur- 

 face of the coenenchyma. 



The close relations of this species to the fossil and recent species of 

 the temperate coasts on the Atlantic side, together with the occurrence 

 of certain shells that are apparently identical in the two regions, but 

 found neither in the arctic nor in the tropical regions {Petricola pho- 

 ladiformis, etc.), is very suggestive of a former connection, perhaps 

 in early tertiary times, between the two oceans, through the temperate 

 parts of North America. 



Phyllangia Edw. and Haime. 

 Phyllangia Milne-Edwards and J. Haime, Comptes-rendus de I'Acad. des Sci., xxvii, p. 



497, 1848 ; Ann. des Sci. nat, 3e ser., xii, p. 181, 1849 ; Coralliaires, ii, p. 616, 1857. 



Coralla encrusting, consisting of clusters of moderately large, 

 turbinate corallites, which arise by budding from a thin, spreading 

 expansion of the basal part of the wall of the parent corallites. The 



I 



