44 VERRILL ON THE POLYPS OF THE 



Cerianthus americanus Agassi z MS. Beaufort, N. C, Wm. Stimpson ; Charleston, S. C, in 

 mud at low water, H. J. Clark, L. Agassiz. 



Antipathes Boscii Lamx. Edisto Isl., S. C, L. Agassiz. 



Anfipathes alopecuraides Ellis. South Carolina, J. Ellis. 



Adrangia astrceiformis M.-Edw. and Haime. Beaufort, N. C, A. S. Bickmore ; Charleston, 

 S. C, L. Agassiz; St. Mary's River, Florida, Williams College Expedition. 



OcuKna implicata Agassiz MS. Cape Hatteras, L. Agassiz ; Beaufort, N. C, A. S. Bickmore. 



Oculina arbuscula Agassiz MS. Charleston, S. C, off the bar, L. Agassiz. 



Analytical Table. 



The following table is intended to aid those in the determination of the genera who 

 may not already be familiar to some extent with the classification of polyps. It will apply 

 only to those genera that are included in the present paper. 



A. Tentacles eight, pinnately lobed (1) {Alcyonaria). 



B. Tentacles six, or multiples of six, simple (7) {Zoantharia). 



Alcyonaria. 



Page 



1. Polyps forming a free, moving community {Renilla) 12 



1. Polyps forming an attached community (2) 



2. Individuals arranged around a central axis (3) {Gorgonidce) 



2. Individuals aggregate, destitute of a common axis (6) {Alcyonidce) 



Gorgonidse. 



3. Axis firm, spiculose, cork -like ( Titanideum) 10 



3. Axis soft, porous, scarcely distinct {Paragorgia) 10 



3. Axis solid and strong (4) 



4. Cells papilliform, covered with imbricated spicula (3Turicea) 8 



4. Cells bell-shaped, covered with scale-like spicula {Primnoa) 9 



4. Cells without external spicula (5) 



5. Cells prominent, verruciform ( Gorgonia) 6 



5. Cells scarcely prominent {Leptogorgia) 7 



Aleyonidae. 



6. Polyps forming a fleshy, lobed community {Alcyonium) 3 



6. Polyps forming a tubulous, branching clump ( Telesto) 5 



Zoantharia. 



7. Polyps secreting a solid, horn-like axis {Antipathes) 36 



7. Polyps forming solid calcareous corals (8) (Astrcearia) 



7. Polyps fleshy, destitute of solid corals (9) {Actinaria) 



Astraearia. 



8. Coral branching, solid within ( Oculina) 40 



8. Coral incrusting, cellular within {Astrangia) 39 



Actinaria. 



9. Polyps compound (Zoanthus) 34 



9. Polyps simple (10 ) 



