15 8 
Z. HYDROIDA. 
Cymodocea. 
Cymodocea,* Lamouroux. 
Character. 6( Plant-like ; cells cylindrical , varying in 
length , filiform , alternate or opposite ; stem fistular , marked with 
rings below , plain above , and without interior division 
1. C. simplex, sfms simple , slightly undulated , twig dike; 
cells long and filiform , alternate. Dawson Turner. *[* 
Cymodocea simplex, Lamour. Cor. Flex. 216, pi. 7, fig. 2. Corallina, 95, 
pi. 7, fig. 2 La Cymodocee simple, Blainv. Actinolog. 487. pi. 81, 
fig. 4. 
Hab. The sea near Yarmouth, and in Ireland, Turner . 
Height nearly three inches : colour a yellow-fawn. 
2. C. co mata, stems straight , cylindrical , almost simple ; 
branchlets capillary , whorled , numerous , flexuous , jointed and 
celliferous . Dr Leach.J 
Cymodocea comata, Lamour . JEZZZs and Soland. Zooph. 15, pi. 67, fig. 
12, 13. Flem. Brit. Anim. 551 -La C. chevelue, Blainv. Actino- 
log. 487. 
ZThA. Coast of Devonshire, Leach. 
Height about one decimetre : colour yellowish. At each joint of 
the branchlets there is a short cell ringed at its base, and almost in- 
visible to the naked eye. 
I have seen no authentic specimen of either species, the above 
descriptions being translated from the works of Lamouroux. He 
says that Cymodocea has the closest relations with Tubularia, 
from which, however, it differs in the position of the polype-cells 
which are placed, not at the top of the branches, but upon these 
branches or upon their divisions. From this circumstance La- 
mouroux classes the genus amongst the Sertulariadae, to which alli- 
ance the absence of ovarian vesicles seems opposed, nor can we hope 
to locate the genus with any certainty until the polypes have been 
discovered. The very existence of the genus has in fact been ques- 
* The name of one of the sea-nymphs into which the ships of iEneas were 
changed by Cybele. 
f D. Turner, Esq. of Yarmouth, F. L. S. : — very eminent for his knowledge 
of cryptogamic botany, and for his skill in antiquities. He is the author of a 
beautiful work on the Fuci. The genus Daw sonia of Robert Brown is a just 
tribute to his merit. 
t William Elford Leach — a naturalist of most indomitable enthusiasm and very 
extraordinary acquirements. He died in Italy in 1836, of cholera. “ We may 
say, with respect to the extent and effect of his zoological labours, — Nihil non 
tetigit, et omnia quae tetigit ornavit.” — Kirby. 
