CCELENTERATA. 661 
pose have been manufactured for Prof. Pagenstecher by M. Sommer at a very 
trifling cost. 
ACTINOZOA. 
Alcyonaria. 
Kolliker briefly refers to his discovery of a true poly- 
morphism in various genera of Aathozoa alcyonaria. The asexual 
individuals appear to preside over the introduction of sea-water 
into the organism^ possessing a body-cavity and stomach like the 
other individuals. They are yet destitute of tentacles. Tiiey 
communicate with the sexual individuals; but the mode in which 
this communication is effected varies with the genera. There 
would appear to be two types in the mode of distribution of the 
asexual individuals upon the polyparies — either distributed among 
the sexual individuals over the whole of the polypigerous region, 
as in Veretillum, Sarcophytony Lituariay &c., or restricted to cer- 
tain definite places, as in PteroeideSy Pennaiulay Faniculinay 
Virgularitty &c. In the Alcyonidoi and Gorgonidm dimorphism 
was not found. The polyps of Tuhipora have been examined by 
Kolliker, who considers their structure as Alcyonariany near 
Clavidaria. Verhand. d. phys.-med. Gesellschaft in Wurzburg 
Sitzung. 28. Dec. 1867. 
Alcyoniidce, 
Cormdaria australis, sp. n., 13usk, 1. c. p. 243, pi. 36. figs. 7, 8, Australia. 
Lobularia (Alcyonium) digitata, Delle Cliiaje. Olaparede describes a very 
remarkable crustacean parasite in tbe cavity of tlie body of this Alcyonarian, 
whicb be does not feel quite certain to be tbe Akyonium digitatilm, L. Tbe 
parasite belongs to tbe genus Lamippe, Bruz., and is called L. proteus. It was 
met with in tbe Bay of Naples. Olaparede, Misc. Zool. No. iv., Annal. des 
Scienc. Natur. 5tb ser. tome viii. 1867, pp. 23-28, pi. 6. 
PennatulidcB. 
Pennatida mollis, sp. n., Alder, l.c. p. 207, tbe Hebrides. It is probable 
that tbis is P. rubra, var. of Pallas ; it is, however, distinct from tbe P. 
rubra, Pallas, wbicb is tbe P. phosphorea of British authors, and probably 
also of Linn^. 
Gorgoniidcs. 
Carijoa, g. n., F. Miiller, Arcbiv f. Naturg. 33. .Tabrg. 1. Bd. 1867, p. 330, 
pi. 9. figs. 66, 67. No diagnosis is given of tbis genus, which is described in 
a footnote to a paper by Fritz Miiller On Balanus armatus, and on a hybrid 
between tbis species and B. improrisus, var. assimilis, Dana.” The stem of 
tbe polypary is formed by a single polyp. Tbe polyp is retractile. The 
plumose tentacles are produced into a thin terminal filament, wbicb appears 
nodose. From the stem spring numerous branches; the great majority of 
these remain simple, but some become branched. The body-cavities of tbe 
individual polyps are not connected with each other. In a fresh state the 
Carijoa is nearly colourless ; but it rapidly bleaches. The generic name is de- 
1867. [voL. IV.] 2 X 
