POLYPI. 
557 
Umbellularia Greenlandica. —The Greenland Umbellularia. 
Plate CIV. fig-. 1. 
Stem long, attenuated above, the polypi congregated in an 
umbel at the apex. Inhabits the Northern ocean. 
Genus 4.— PENNATULA.— Lamarck. 
Generic Character .—With a free, fleshy, penniform body ; 
having a stem inferiorly naked, winged above, and embracing a 
cartilaginous or osseous axis; with distichous, open, depressed, 
and plicated pinnulae, polypiferous in their upper margin ; the 
polypi having radiated tentaeula. 
Pennatula phosphorea .— The Phosphoric Pennatula, or 
Sea Pen. 
Plate CIV. fig. 9. 
With a fleshy, long, round stem, papillous beneath, and sca¬ 
brous ; the marginal pinnae pectinated ; of a fine pink colour. 
Inhabits the British seas. 
ORDER II.—POLYPI TUBIFERI. 
The animals united in a common fleshy body, either simple, 
lobed, or with ramifications, and constantly fixed by their base ; 
without any solid internal axis ; surface entirely or partly cover¬ 
ed with tubiform cylinders, rarely retractile; mouth terminal, 
with eight pectinated tentaeula.—It consists of five genera; viz. 
1. Lobularia; 2. Cliona; 3. Ammothea; 4. Xenia; and, 5. 
Anthelia. 
Genus 1.—LOBULARIA.— Lamarck. 
Generic Character. — Having a common fleshy body, elevated 
upon the base, and rarely supported by a short stem, which is 
either simple or provided with lobes; surface closely beset with 
polypi, which are quite retractile, cylindrical, and having eight 
grooves outside, and eight pectinated tentaeula. 
2 z 3 
