308 Rev. T. Hincks’s Catalogue of Zoophytes 
generally not united, nor do they ever form the deep, somewhat 
curved, transverse rows which are so characteristic of T. serpens. 
The dividing lines are much less strongly marked than in the 
latter species, and disappear altogether in the expanded portions 
which terminate the lobes. The lobes or segments are linear 
and narrow, gnd more or less rounded at the extremities. Those 
of 7’. serpens are usually truncate. The polyzoary is depressed, 
and of a dull-purplish colour, wanting altogether the bright 
frosted surface of the other species. ; 
The “flower-like” variety of JT. serpens, which Mr. Alder 
identifies with the 7. lodulata of Hassall (Northumb. Catal. 
p- 46), may be the radiate form which I have described under 
the first-named species. 
[Isle of Man, very common on old shells.] 
8. T. phalangea, Couch. 
Common on shells and weed in moderate depths: Salcombe 
Bay (abundant), &c. 
Cornwall, “in from 10 to 20 fathoms water, common” 
(Couch). 
This fine species exhibits two marked forms. In one, the 
polyzoary is subcircular or very obscurely lobed ; the cells are 
long, slender, sub-erect, and somewhat flexuous, crowded toge- 
ther, and often disjunct at the upper extremity; the mesial 
dividing lines are almost obliterated. In the other, the lobes 
are distinct and pointed; the cells are short, united through- 
out, of somewhat larger bore than in the preceding, and 
arranged with extreme regularity on each side of a well-defined 
line, which runs from the centre to the extremity of each lobe. 
The spaces between the lobes are filled with cells, sometimes 
united in pairs, sometimes single. Towards the margin they 
are horizontal and wholly immersed, the apertures forming a 
close network. In this beautiful form the polyzoary is much 
depressed, and the surface flat. 
To this species perhaps may be referred a remarkable Tubuli- 
pora which I have met with in old bivalve shells from Sal- 
combe Bay. It forms large, somewhat circular, lobate masses, 
about an inch in diameter. The central portion is round, with 
sometimes as many as ten lobes, which are broad at the base, 
then gradually narrow for some way, and at the extremity ex- 
pand into a clavate head. The heads, which vary in size, occa- 
sionally coalesce, and in some cases the lobes are united through- 
out the greater part of their length, and we have a somewhat 
circular crust with a very irregular and jagged outline. On the 
central disk and the basal portion of the lobes the cells are 
arranged as in the normal 7. phalangea, On the enlarged heads 
