4316 Tue ZooLoctst— FEBRUARY, 1875. 
to have seen this mode of reproduction by this particular genus 
previously recorded. 
It is hardly too much to say that scarcely any animals of the 
radiate type could exhibit such a mass of lovely and varied colours. 
Unfortunately, or rather (for the benefit of the future) fortunately, 
they are not readily removable, for the granite on which they are 
located is so studded with sponges and tunicate Mollusca, in the 
interstices not occupied by the anemones, that when a mass of 
rock has been chipped off and placed in the aquarium, unless 
the former are carefully scraped away, decomposition very soon 
sets in, and the whole collection suffers. 
My friend Mr. A. W. Wills was good enough to go over my 
collection of Hydrozoa and Polyzoa, and he mounted the best 
specimens which I exhibited at a “microscopic evening” of the 
Birmingham Natural History and Microscopical Society. He 
made out about six genera, those usually found, such as Tubularia, 
Cawpanularia, Sertularia, Plumularia, Clytea, &c. ‘The Polyzoa 
were more numerous, and comprised more than ten genera, the most 
interesting being Crisia, Crisidia, Canda, Anguinaria, Scruparia, 
Bugula, Bicellaria, Pedicellina, Bowerbankia, and Farrella. The 
collection was not, however, a satisfactory one, as about forty-five 
genera of these two classes are recorded as local in Prof. Ansted’s 
book. Doubtless the time of year was unfavourable for good 
examples of the Hydrozva, but there is no reason why I should not 
have done better with the Polyzoa. Very few Meduse were seen, 
and, although the sea was calm, the phenomenon of phospho- 
rescence from Noctilucz was not once observed. The temperature 
was, however, low at the time. 
The Tunicate Mollusca contribute very greatly to the splendour 
of these caves, and in some instances exceed the area of space 
occupied by sponges and sea anemones. I found several genera 
there which puzzled me much, as they were not recorded in 
Professor Ansted’s book, and I hardly believed that they had been 
overlooked; so I wrote to the Rev. A. Merle Norman, who 
courteously replied and confirmed my impressions. They com- 
prised Aplidium—fig-like lobes of honey-yellow colour; Sidnyum, 
what Forbes and Hanley called S. turbinatum, but, as Mr. Norman 
points out, “not the Sidnyum of Savigny, but what has been de- 
scribed by the late Joshua Alder, who discovered F. and H.’s mis- 
take, as Parascidia Forbesii,” of translucent coral-like appearance. 
