276 
Z. ASCIDIOIDA. 
Cellepora. 
is generally smooth and more or less rounded : it is sometimes of a 
yellowish-brown colour, but commonly white, and when dry appears 
“ as if covered over with a silver varnish.” 
Notwithstanding the apparent dissimilarity in habit of the three 
preceding Celleporae, I cannot but suspect that they are merely dif- 
ferent states of the same species : for in these productions the “fronti 
nulla fides” receives many an apposite illustration. 
4. C. cervicorniSj much and irregularly branched ; branches 
compressed , palmate , truncate ; surface roughish or even , com- 
pact, with simple circular pores disposed in quincunx . Borlasse.* 
Plate xxxiii. 
Porus cervinus, Borl. Cornw. 240, tab. 24, fig. 7 Millepora cervicor- 
nis, Stew. Elem. ii. 427. Turt. Brit. Faun. 204 M. compressa, Sow- 
erby , Brit. Misc. 83, pi. 41. Turt. Brit. Faun. 204. Jameson in Wern. 
Mem. i. 560. Cellepora cervicornis, Flem. Brit. Anim. 532. 
Hah. “ In deep water, not rare,” Fleming . Cornwall, Borlasse. 
Devonshire, Dr Coldstream . Shetland Islands, Jameson . 
A single specimen of this coral is about 3 inches in height and 
somewhat more in breadth. It rises from a broad flattened base, and 
begins immediately to expand and divide into kneed branches or broad 
segments, many of which anastomose so as to form arches and imper- 
fect circles. The extreme segments are dilated and variously cut, 
truncate. Both sides are perforated with numerous pores just visible 
to the naked eye, and arranged in regular rows : the pores are circu- 
lar, even with the surface on the smooth and newly formed parts, but 
on the older they form the apertures of urceolate cells which appear 
to be formed over the primary layers of cells, and give to the surface 
a roughish or granular appearance. The orifice is simple, contracted, 
with a very small denticle on one side. The thickness of the branches 
varies from a half to two lines ; the interior cellular ; the new parts 
formed of two layers of horizontal cells, but the older parts are thick- 
ened by cells superimposed on the primary layers. This species 
certainly treads closely upon the genus Eschara, but Dr Fleming and 
Milne-Edwards, who had examined an authentic specimen in the 
York Museum, both agree in making it a Cellepora. It is entirely 
distinct from Eschara cervicornis, with which it has been confounded. 
* Borlasse, William, of Ludgvan in Cornwall, D. D., born Feb. 2, 1695-6 ; 
elected F. R. S. in 1750 ; died Aug. 31, 1772 : the author of a History of Corn- 
wall still held in estimation ; and characterized by his contemporaries as an “ able 
and worthy man.” See Pennant’s Literary Life, p. 1. 
