99 
? Wellington boot cut off nl the neck, with the toe below and 
lee l above. The aperture is oval, snbterminal, or like the 
opening of the shoe; in the dried state it has a thick, short, 
‘Jbular rim, which in living specimens is not apparent. 
■■neath the rim there is frequently seen a short lubulous 
'Pine; this is the rudiment of another cell. This is proved 
v many specimens showing the different gradations to the 
Perfect cell, and that all the branches arise from this situa- 
'°n, while the other cells are attached to each other by the 
' e el and toe. When the specimens are living, the cells are 
*° transparent, that the polype may be seen through ; so 
1: 't when the animal is expanded two muscles are distinctly 
he seen, one attached to the base and (he other to the back 
'he cell, and the animal is found to he encased in a 
'i |JS e tubular sheath, to which the muscles are attached, and 
Vv| >icl, is partially protruded when the polype is expanded. 
* * Cells paired with a joint between each pair. 
TUFTED IVORY COLALLINE. Crisia Eburnea. Cells 
loosely aggregated, cylindrical, bent, tubular; orifices 
f|, ee. PI. 18, fig. 2. 
j, Tuft e( ] Ivory Coralline, Ellis’ Coral., p. 39, table 21, no. 6, 
J** a A. Sertularia eburnea, Turton’s Lin., vol. 4, p. 60S. 
‘'ewart’s Elein., vol. 2, p. 449. Cellaria eburnea, Ellis and 
manders Zooplt., p. 24, no. 7. Crisia eburnea, Lamou- 
0|, x’s Cor. Flex., p. 133, no. 244. Fleming’s Brit. An., 
‘ v>40, no 156. Templeton in Mag. Nat. Hist., vol. 9, 
' 4, >8. Johnston's Brit. Zooph., p. 262, pi. 31, fig. 3, 4. 
^ Hob, On the roots of sea weed, and the sides of the 
jO’widi cra b, abundant. Talland sand bay, Wliilsand bay, 
: mtiv e t bay, St. Austle bav, Polperro, Port-Holland beach. 
the crumb of bread sponge. Common. 
T his white calcareous zoophyte varies in height from 
^■fourth to one inch, and grows in white ivory tufts, many 
"'Lie h are sometimes united to each other at intervals 
a creeping fibre. The polypidom is sometimes much 
( 1 j 3ri ®l | ed, arid always in an alternate manner. The cells are 
? r,a I> tubular, with free apertures, are loosely aggregated, 
a ■' Nearly opposite. They are frosted, or marked with 
c Un llte < * ots "’Ll 1 pfr' n transparent centres. In young spe- 
the branches all arch inwards, and give the small 
b,. l f S a P^lly appearance. The vesicles are very rarely to 
s ha ° an<1. They are rough or frosted, and somewhat urn- 
(1 'fed with narrow tubular necks, which are not placed in 
centre. 
cl C K JOINTED CORALLINE. Crisia. Luxata. Cells 
■ u ? Se |y aggregated, cylindrical, nearly straight, with short 
u *ar orifices ; joints black. PI. 18, fig. 3. 
