194 Mr. A. E. Verrill on the Classification of Polyps. 



such as inner tentacles, verrucae, complicated or simple branchial 

 lobes, cinclidae, eye-spherules, suckers, &c. Mouth with special 

 lobes or folds. Most of the species are simple, a few are com- 

 pound by fissiparity, many abnormally bud from the wall near 

 the base, a few secrete from the base a horn-like deposit similar 

 to the axis of Antipathes. 



Families : Actinidse, Thalassianthidae, Minyidae, Ilyanthidae, 

 Cerianthidae. 



Order III. ALCYONAMA. 



Polyps with well developed actinal, mural, and abactinal re- 

 gions, compound by budding. Tentacles eight, pinnately lobed, 

 long, encircling a narrow disk. No interambulacral spaces. 

 Ambulacral ones open and wide. 



Suborder I. Alcyonacea. 



Polyps turbinate at base, budding in various ways, encrusting, 

 adherent to foreign bodies by the ccenenchyma. 



Families : Alcyonidae, Xenidae, Cornularidae, Tubiporidse. 



Suborder II. Gorgonacea. 



Polyps cylindrical, short, connected by a ccenenchyma, se- 

 creting a central supporting axis. 



Families : Gorgonidae, Plexauridae, Primnoidae, Gorgonellidae, 

 Isidae, Corallidae, Briaridae. 



Suborder III. Pennatulacea. 



Polyps forming free moving colonies, the composite basal 

 portion with locomotive functions and special cavities, with or 

 without a solid free axis. 



Families : Pennatulida, Pavonarida>, Veretillida, Renillidce. 



Among the most interesting species in this collection the 

 following may be mentioned : — 



Stephanoseris lamellosa, Verrill. 



Coral low, subcylindrical, with a broad base, which completely 

 covers small univalve shells, with the exception of the opening ; 

 wall rudimentary ; septa in four cycles, the primaries much the 

 largest, with subentire rounded tops ; columella well developed, 

 papillose ; costae prominent, unequal. 



Loo-Choo Islands. Dr. Win. Stimpson. 



Heterocrjathus alternata, Verrill. 

 A low species with very unequal septa and costae, the primary 



