26 
alternate manner ; the stem is slightly zig-zag with a few <hf' 
tantly arranged cells on it. The upper part of the stem, |Q 
this variety, frequently bends from the straight line at al) 
obtuse angle. In young aDd newly formed parts the colou* 
is of a pure silvery white, which changes with age to a stra" r 
yellow and finally to a brown colour. 
SEA CYPRESS. S. Cupressina. Polypidom cauliferous - 
cells nearly opposite, tubulons, adnate ; aperture 
and not everted, with one large and two small late* 11 
teeth. Vesicles vasiform. 
Sea Cypress, Ellis’ Coral., p. 7, no. 5, tab. 3, fig. a 
Sertularia Cupressina, Ellis and Solander’s Zooph., p- 
no. 5. Tnrton’s Lin., vol. 4, p. 667. Stewart’s Elen 1 -' 
vol. 2, p. 442. Templeton in Mag. Nat. Hist., vol. 9, p. 
Johnston’s Brit. Zooph., p. 135, pi. xiii. Dynameua C u ' 
pressina, Fleming’s Brit. An., p. 543. 
Ilab. St. Ives bay. 
The only Cornish locality from which this species h^ 
been obtained is St. Ives bay ; from which I have procure 
three specimens. It is stouter and more spiry than the l aS ' 
The stem is stout, and gradually tapers from the base to I* 1 
apex ; and is slightly zig-zag, which is made more appar® 0 
by the pinnae falling off and leaving a slight protuberance- 
The pinnae are alternate and branched, the branches hang 111 ^ 
nearly parallel to each other. The cells are biserial, close j 
arranged and semi-alternate or opposite; they are smooth’ 
and closely adherent; the base slightly bulging; the ap er 
tures look upward, are patulous and armed with a long t° ot 
on the outer, with two smaller ones on the lateral edge, ° 
each side of the pinnae. The vesicles are vasiform ' vl ^ 
short peduncles; their apertures, small and tubular, and a 
the base of the neck are two large spines, which liowerer 111 ^ 
occasionally absent. The vesicles are sometimes so a * lUl j 
dantly produced on the upper edges of the pinnae, as to b el ’ 
them into arches, which gives the polypidom a peculi ar " 
graceful appearance. ( 
This species hears so elose a resemblance to the last, l* 1 
Pallas considered them to be no more than varieties ot , 
same, and in this opinion he was followed by Linnaeus. “ 
Ellis in his work edited by Solander, opposes such 
opinion. lie says, “these last two Corallines, 
supposed by Linnaeus to he the same, when they corne 1°. 
compared, have quite a different habit and manner of g*° w | |I1 ( fj> 
The latter or Sea Cypress is always found in very d ^ 
water, and the side branches often as long again aS . [ 
Squirrel’s Tail.” In addition to this I have observed 
