SUBDIVISIONS OF AGT1N0ID POLYPS. 67 



quite solid. Transverse septa between the lamellae are some- 

 times wanting. The calicles are usually striated externally 

 but seldom dentate. The polyps, moreover, are small; and 

 very commonly they stand prominent above the corallum when 

 expanded. The Orbicella, figured on page 55, is an example 

 of one of the massive Astoea-like forms, constituting the Or- 

 bicella family, or Orbicellidce, in the Oculina tribe. 



The Caryophyllia here figured is one of the solitary species 



CARYOPHYMilA SMITHII, STOKES. 



of the tribe found in European Seas, and on the coast of 

 Great Britain. The figure is from Gosse's British Actinology. 

 It also grows much, longer in proportion to the breadth. The 

 figure to the right is of one unexpanded. One of its lasso- 

 cells, in different states, is shown in figures 3, 4, 5, on page 31. 



The corallum of a related species is given on page 42. The 

 walls and septa are remarkably solid. This species has been 

 found not only in the Mediterranean, but also over the bottom 

 of the Atlantic even as far north as the British Isles. 



Another example of this tribe, as defined by Prof. Verrill, 

 is the species of Astrangia occurring alive along the southern 

 shores of New England, and on the coast of New Jersey. 

 Specimens are not uncommon in the vicinity of New Haven, 

 on the rocks by the Light-House, and at other places in Long 

 Island Sound, and when alive it is an exceedingly beautiful 



