NOTICES OF MEETINGS. DE 
mains dormant, forming the Cysticercus. When flesh, thus infested, is swallowed 
by man, the Cysticercus is developed into the fully-formed tape worm. In con- 
nection with this parasite, there is the advantage that when present it cannot 
easily be overlooked, as the meat infected with it has a very characteristic 
appearance. Should there be any doubt, the discovery of the hooklets under 
the microscope would at once dispel it. The reading of the papers was followed 
by an interesting discussion, in which the chairman, the authors, the Rev. W. 
Smith, and Messrs, Burman, Kirk, Stiles, and Tindall took part. 
LIVERPOOL MICROSCOPICAL SOCIETY.—The sixth meeting was 
held at the Royal Institution, Colquitt Street, on Friday, the 3rd June. The 
evening was devoted to an exhibition of the circulation of the blood in several 
different forms of animal life, by the members of the society. The subject was 
introduced by a short paper on the structure of blood corpuscles, by Frank T. 
Paul, Esq., F.R.C.S. The paper included a short description of the chief 
varieties of blood cells met with in the different divisions of the animal king- 
dom ; but the only corpuscles that were minutely described were the red and 
white blood cells of the higher animals. The structure of the red cells was now 
universally considered to consist of a porous stroma, which was permeated by 
the essential element of red blood, called the Zodid, the character of which was 
considered, both chemically and microscopically. The white cells were shewn 
to be of almost equal importance with the red ones, for while the latter are con- 
cerned with the nourishment and areation of the tissues, regeneration of injured 
parts depends entirely upon the former. The manner in which this takes place 
was described in association with reparative and destructive inflammation. In 
the latter the white cells of the blood become pus corpuscles, and thus a great 
discharge of pus has a very deleterious effect upon the constitution of the blood. 
The paper was illustrated by diagrams and various preparations of blood 
corpuscles. 
At the conclusion of the paper the meeting resolved itself into a conversazione, 
when the subject was illustrated by the following :— 
Specimens illustrating the paper...............00000 Pia Paulebok Css. 
Blood corpuscles of Cassowary ........ssseeeseeeeeneen ees Thomas C. Riley. 
Do. BOG eaencs co ccee de caeaein ssn seeeenesseess E. G. Tooker. 
Do. Salamander Srts-ceseeps so serete cassesee H. C. Beasley. 
Circulation of blood in Asellus vulgaris ....c.cccecscee eee ees John Vicars. 
Do. Wishes’ tailhesescacs.- conse se cnseres Dr. McClelland. 
Do. Fresh-water Shrimp...........+-..++- H. R. Boult. 
Do. HxO97S) TOO) s.ess- sence: -esencetedaseet Tapley Bacon. 
Do. aeksharpt scccctenees- scenes: Isaac C. Thompson. 
Do. PUES HORT ULANS eins co oso seeer neeaeee ss Dr. Hicks. 
De. Tadpoles 24. -S.cjape. satesseseoe Rev. W. Banister. 
Do. DDOG aT Sasnasieacees cts ceanerss aaa G. F. Healey. 
Do. Wouno Newtsenenscsse-acecsce Henry M. Bennett. 
MANCHESTER MICROSCOPICAL SOCIETY.—The fourth ordinary 
meeting of this session was held on Thursday, June 2nd. There was a good 
attendance, and eight additional members were added to the Society’s roll. 
The business of the meeting was varied, and principally consisted of communi- 
cations from the following members :—The President, Messrs. Thos. Brittain 
and Geo. E. Davis, Vice-Presidents ; Mr. Herbert Chadwick, Mr. Hyde, Mr. 
Aylward, and Mr. Cook. 
Mr. John Boyd, the President, in his communication on Leptodora hyalina, 
stated that when he announced last autumn that he had found Z. hya/ina in 
Lake Derwentwater, he said that he fully anticipated that if other lakes were 
properly examined it would also be found in them. Recently he had an oppor- 
tunity of verifying this assertion, as in May last, while spending a short time at 
