The Eckinodcrmata of Jhew Trunswick. 
51 
I'liis Starlisli is one of the most interesting upon oiir coast, and unfor- 
tunately is not at all common. It is pentagonal in form, much arched 
above, and about two inches in diameter, though specimens four inches 
in diameter have been found. All around the outer lower edge of the 
rays runs a narrow fm-like web, and the whole upper surface is covered 
by a membranous skin which is supported upon the extremities of the 
spine clusters. This skin, therefore, covers the upper surface of the 
body as a tent with many poles covers the earth, and in the covered 
space thus formed the ova arc protected and the young develop. Upon 
the under side there are peculiar spine-clusters along each side of the 
ambulacral furrows. 
Connected to near their tips by a web or membrane are five or six 
long spines, lying all in one plane at right angles to the length of the 
ray, the outermost of which is much the largest. These large outer 
spines are connected together by and form the support of the web 
already mentioned, which runs all around the rays. In color it varies 
from brick red through flesh-color and yellowish white to pure white. 
Nothing is known of its habits, and there is still much to be learned 
about its development, though it is known that the young live in the 
pouch formed by the skin of the back, and develop without a meta- 
morphosis. 
[In addition to the above species Prof. Verrill tells the 
writer that he has from the Bay of Fundy, xisterias compta, 
St., a second species of Pter aster of small size, a small 
Asterina, and, he believes, Solaster furcifer, and probably 
others.] 
Class III. ECHINOIDEA (Sea-Urchins). 
Spherical, heart-shaped, or d%sk-shaped Echinoderms loith immov- 
able skeletov, 'made up of calcareous plates^ enclosincj the body 
like a shell and ca.rrying movable spines, and with locomotive 
and often respiratory amhidacral apipendocjes. 
Order I. CIDARIDEA (Regular Sea-Urchins). 
Ecliinoids vniti central mouth and equal hand-like ambulacra. 
FAMIUY ECHINI!) a:. 
With a round thin shell, broad ambulacral spaces bearing tubercles and spbies,. 
the pores grouped in transverse rows; oral branchial present. 
19. Stroiigyloceiitrotiis drobacliiensis« (Muller), A. 
Agassiz. Echinus granulatus, Say, Gould. (D). Tox- 
opiieustes Drobachiensis, (K). Euyechinus Drobachien- 
