25 
SQUIRREL’S TAIL. & Argentea. Polypidora spiry 
a nd waved ; cells alternate, bulging at tbe base, and 
sharply pointed at tbe outer edge of the aperture, the 
Upper half divaricated. Vesicles vasiform. 
Corallina muscosa, alterna vice denticulata, ramulis in cre- 
e| riaia capillarnenta sparsis, Rail Synop. Slirp., vol. 1 , p. 36, 
®°- 16. Squirrel’s Tail, Ellis’ Coral., 6, no. 4, lab.2, fig. c. C. 
” e rtularia Argentea, Ellis and Solander’s Zooph., no. 4. 
P' 38. Turton’s Lin., vol. 4, p. 667. Stewart’s Rlem., vol. 2, 
p. 44 . 2 , Templeton in Mag. Nat. Hist., vol. 9, p. 468. 
”°hnston’s Brit. Zooph., p. 134, pi. xii. and pi. xi., fig. 3, 3. 
, yoamena Argentea, Fleming’s Brit. An., p. 544. Sertu- 
a ria Argentea, Lamouroux’s Cor. Flex., p. 192. 
Sab. On stones and shells from deep water off Polperro, 
Coi »)tnon ; St. Ives bay. 
kitice writing the paper on the Zoophytes of Cornwall for 
lle Polytechnic Society, I have found this species to be more 
j^mon in deep water than I had previously supposed. In 
r., e adult state it is the most beautiful of all our corallines, 
j '« stem is smooth, without cells, divided at irregular 
Jdervals by imperfect septa, and grows to the height of 
’Khteen inches. The pinna?, which bear the cells, arise in 
^ lr . s from each internode in such a manner that five or six 
.^circle the stem; and as each pinna is again branched in an 
j.J e gular, though somewhat dichotomous manner, the whole 
so bushy an appearence, as entirely to hide the stem 
view, from which circumstance it derives its name, 
at 6 P°lypidom sometimes consists of a single stem only, but 
C | i ° l hers it has one or more branches of the same size and 
he 3130161 " as l ^ e P r * mar y trunk, which greatly adds to the 
Sp aut y of the species. On our shores, however, the larger 
^cimens are generally much injured from the violence of 
0( p Waves; having their cells and pinna? broken or washed 
Witt, ^ le ce ^* s are ^'serial, alternate, bulging at the base 
s]j diverging and contracted necks; their apertures are but 
ii, l ly everted, being- rather directed upwards and laterally 
than _ 
tQo .° utwa i'ds. In some specimens the outer edge ot the 
is at 1 ' s produced into a sharp point, which in many others 
cl e ' Vant j D g, the apertures being altogether plain. The vesi- 
* ar * s e along the upper edges of the pinna?, and are 
Wfi* ° r ™> inclining to the ovoid, smooth, and transparent 
p r(j etl living, semi-opaque and transversely wrinkled, when 
y 
°he ? UDg specimens are very common in deep water, at from 
ho , sey ea or eight leagues from land, but in form they bear 
e *eniblanca to the old. They are simply pinnated in an 
