Miesclldewisid: 227 
erease in thickness of this corallite being made up by the increased 
size of the non-septate interior. For this larger species I would 
propose the name Athmophyllum Whitneyi, in honour of Prof. J. D. 
Whitney, to whom I am indebted for the use of the specimens. 
Of the other species I have seen but a single specimen, which is 
imperfect at both extremities, about 2°15 inches in length, and only 
about 0-20 inch in diameter at the larger end, and 0°15 at the 
smaller, with some 24 to 28 septa. In addition to its much more 
slender form, it differs from the other species in having its septa so 
strongly waved laterally as almost to divide the interseptal spaces 
into cells, nearly to the outer wall. For this, if it should prove 
to be a distinct species, I would propose the name Hthmophyllum 
racile. 
' ‘The specimens were all obtained at Silver Peak, Nevada, and 
were discovered by Mr. Clayton.—Stlliman’s American Journal, Jan- 
uary,. 1868. 
Note on the Polymorphism of the Anthozoa and the Structure of the 
Tubipore. By A. Korrixer. 
The polymorphism of individuals, so remarkable among the Aca- 
lephe, has had nothing corresponding to it among the other Coelen- 
terata ; it is therefore a very unexpected discovery that M. Kél- 
liker has lately made, of a true polymorphism in various genera of 
Anthozoa Aleyonaria. This polymorphism consists in the existence, 
besides the large individuals capable of taking nourishment and 
furnished with generative organs, of other, smaller, asexual indivi- 
duals, which appear essentially to preside over ,the introduction of 
sea-water into the organism, and then over its expulsion, and which 
are perhaps at the same time the seat of an excrementitial secretion. 
Like the others, these asexual individuals possess a body-cavity 
divided into chambers by eight septa, and a pyriform stomach with 
two orifices. On the other hand they are entirely destitute of ten- 
tacles; and instead of the eight ordinary mesenteric filaments there 
are only two, supported upon two consecutive septa. The cavity of 
the body of these individuals is always in communication with that 
of the sexual individuals ; but the mode in which this communication 
is effected is liable to vary with the genera. 
We may distinguish two types in the mode of distribution of the 
asexual individuals upon the polyparies. In the first they are distri- 
buted in great abundance over the whole polypigerous region of the 
polypary, among the sexual individuals. This is the case in certain 
Aleyonids which M. Kolliker refers to the genus Sarcophyton, and 
also in Veretillum, Lituaria, Cavernularia, and Sarcobelemnon. In 
the second case the asexual individuals are restricted to certain per- 
fectly definite places, which, however, are variable according to the 
genera. Thus in certain species of Pterocides they occur on the 
lower surface of the pennate leaves of the region serving for attach- 
ment, in the form of a larger or smaller plate; in other species of 
the same genus they are also found at the apex of the polypary ; in 
