POLYPI. 
531 
Antipathes spiralis. — The Spiral Antipatiies. 
Plate CIV. fig. 10. 
Sub-spiral, simple, and scabrous. Inhabits the Indian ocean. 
Genus 10.—ISIS.— Lamarck. 
Generic Character. —Fixed, formed like a tree, with a jointed 
axis, and an exterior crust; central axis branched, with stony 
striated articulations, and horny between the joints; crust con¬ 
taining polypi in the recent state, which disappear when re¬ 
moved from the water. 
Isis hippuris. — The Horse-tail Isis. 
Plata CIV. fig. 13. 
Somewhat branched, with a smooth, thick, many-osculated 
crust; joints of the axis stony, sulcated, irregular, and the last 
compressed ; intervals horny. Inhabits the Indian ocean. 
Genus 12. — CORALLIUM.— Lamarck. 
Generic Character. — Fixed, branched and stiff, but not arti¬ 
culated ; with a caulescent, branching, stony, solid axis ; striated 
on the surface ; with a soft and fleshy crust, containing polypi 
while recent, but when dried, becomes thick, porous, and of a 
reddish colour; the mouth of the polypi furnished with eight 
ciliated and radiated tentacula. 
Corallium rubrum. — -The Red Corallium. 
Plate CIV. fig. 14. 
Bright carnation red. Inhabits the Mediterranean and In¬ 
dian seas. 
Section III. 
With stony polypiferous masses, and stellif’orm lamellte or 
waved laminar furrows. 
Genus 13. — OCULINA.— Lamarck. 
Generic Character —With a stony polypiferous mass, gener¬ 
ally branching and fixed ; the branches smooth, thick and short; 
stelliform mouths in some terminal, the others lateral and 
superficial. 
