STFLINA. POLYPI. 



S. orgatium, Lam. Tubes cylindrical,, erect, separated, aggregated 

 in a thick mass ; external and transverse laminae connecting the 

 tubes. Inhabits the Red Sea, and found fossil on the coasts of 

 the Baltic. Law. ii. 223. 



Gen. 30. STYLINA, Lam. 



Stony, forming simple masses, rough exteriorly ; tubes numer- 

 ous, cylindrical, fasciculated, united, containing laminag radi- 

 ating on a solid axis ; axis styliform, projecting beyond the 

 tubes. 



S. echinulata, Lam. Thick, fasciculated, composed of vertical tubes, 

 sessile ; rough with pointed styles above. Inhabits South seas. 

 Lam. ii. 221. 



SECTION IV. 



Polypiferous mass stony, solid, compact interiorly ; cells per- 

 forated or tubular, and destitute of laminae. 



The Polypi of this section are rather to be considered aggregated than com- 

 pound animals, as the structure of the mass seems to make it impossible they could 

 communicate together. They assume various forms ; sometimes simply incrusting 

 marine bodies, or forming irregular lobed masses, more or less finely divided, or with 

 branched expansions in the form of plants. The cells appear as simple openings, 

 nearly cylindrical, with smooth or sometimes striated walls. 



Gen. 31. TUBIPOIIA, Lin. 



Stony, composed of cylindrical tubes, straight, parallel, indivi- 

 dually separate, but joined by external and transverse parti- 

 tions ; tubes articulated, communicating by radiating and po- 

 rous partitions. 



T. musica, Lin. Tubes cylindrical, distinct, the partitions distant ; 

 colour bright red ; polypi tentaculated, fringed, and of a fine green 

 colour. Indian seas. D'Argenv. pi. 4, fig. A. Ellis, Zooph. pi. 27- 

 Plate 8, Jig. 11. 



Gen. 32. CATENIPORA, Lam. 



Stony, composed of parallel tubes, inserted in the thickness of 

 vertical plates, anastomosed like net-work. 



The species of this genus are fossil and found on the shores of the Baltic. 



Gen. 33. FAVOSITES. 



Stony, simple, of variable form, composed of parallel prismatic 

 tubes disposed in bundles ; tubes contiguous, pentagonal or 

 hexagonal, more or less regular, rarely articulated. 



F. alveolala, and Gothlandica, both fossil. 



Gen. 34. MILLEPORA, Lam. 



Stony, solid interiorly, polymorphous, branched or frondescent, 

 furnished with simple pores ; pores cylindrical, in general 

 very small, sometimes scarcely apparent, perpendicular to the 

 axis or to the expansions of the polypiferous mass. 



The Millepores are stony masses of various shapes, frondescent, flattened, or rami- 

 fied according to the species. 



VOL. II. E 6 



