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POPULAR SCIENCE REVIEW. 
the Entomologist’ s Annual. Several new Entomostraca, inhabiting chiefly 
the Firth of Clyde, and belonging to the genus Cythere, have been de- 
scribed by the Rev. A. M. Norman ; as well as fresh-water species of 
Cypris and Candora from ponds in Durham. Dr. John Anderson describes 
and figures in the “Annals,” a new species of Holothuria, dredged in Bres- 
say Sound, Shetland, at five fathoms ; and the same observer has systema- 
tised tire genus Sacculina, which is found parasitic upon crabs, describing 
one species, S. triangularis , which he finds commonly upon the edible crab 
( Cancer Pagurus ) of the Firth of Forth. Against all these additions, also, 
must be deducted a fresh-water mollusc ( Pliysa acuta), lately described as 
having been met with in a brook near Bushy Park, the presumed discoverer 
of which, however, now candidly confesses it to have been an error. 
Before closing this resume, we would call attention to the valuable cata- 
logue of the Zoophytes of South Devon and Cornwall, now in course of 
publication by the Rev. Thomas Hincks, of Leeds, in the “ Annals of Natu- 
ral History.” The subject of British Zoophytology is one which needs care- 
ful revision, and we regard these papers as of great importance, and look 
forward with pleasure to the forthcoming work on British Zoophytes, 
which the same gentleman is preparing. 
POSTSCRIPT. 
Since our Astronomical Summary was completed we received from Mr. 
G. F. Chambers an account of the discovery of a new minor planet by Dr. 
C. H. Peters, of Hamilton College, Clinton, New York. It will take the 
number seventy-one (Niobe, discovered in August last, becoming seventy- 
two), inasmuch as it was discovered in May last, although only now 
made public. The same correspondent also announces the discovery, by 
Mr. A. Clark, optician, Boston, F.S.A., of a new star, a companion to 
Sirius. This was made with an improved instrument, which is likely to 
aid in the development of astronomical research. 
We are compelled most reluctantly to defer the insertion of Professor 
Ansted’s second paper on Caverns. 
