254 
NOTES AND MEMORANDA. 
tion of Oculars,” by W. H. Seaman. “ On a New Turn-table,” by 
John Sidle. “ On Epithelium,” by Wm. H. Atkinson. “ On a New 
Analyzing Eye-piece,” and “ On a New Arrangement for Bark Field 
Illumination,” by Wm. Lighton. 
The afternoon of August 16th was occupied in an excursion round 
the city, and in the evening a reception and exhibition was held, 
at which is said to have been exhibited “ probably the finest and 
most imposing display of microscopes, apparatus, and objects ever 
made in the country.” 
Before the adjournment of the Congress (to Buffalo, N.Y., in 
1879), it resolved itself into a permanent and independent organiza- 
tion, under the name of the “ American Society of Microscopists,” 
by the adoption of a constitution, and the election of officers and 
an executive board of three for the ensuing year. Dr. R. H. Ward 
being president. 
“ Unit of Micrometry .” — At the American Microscopical Congress, 
the following resolutions were proposed by Professor Hitchcock, and 
adopted : — 
Resolved, — That this Congress, representing the various Micro- 
scopical Societies and microscopists of the country, recommend and 
adopt, for universal use, from this time forth, the of a millimetre 
as our unit of micrometry. 
Resolved, — That we request each Society of microscopists to 
formally approve our action in this matter, and to request that all 
authors of papers conform to these resolutions whenever practicable, 
and that they may communicate whatever action they may take to the 
New York Microscopical Society. 
Rcsolvetl, — That we request microscopical organizations of all 
countries to formally adopt this same unit, and commuuicate their 
action to the same body. 
A New Cestoid Host. — Dr. August Gruber, of Freiburg, relates 
that on accidentally crushing a specimen of Cyclops hrevicaudatus, 
under the covering glass he discovered a small worm, which wriggled 
about in a lively manner beneath it. On examining it he could see 
plainly a cuticula, and in the interior a great number of calcareous 
particles. The head was furnished with four well-formed suckers, but 
was not armed with hooks. 
On proceeding to examine a considerable number of these Cyclops, 
he found that there was quite an epidemic of such small worms 
affecting the animals. The worms were of all ages, from small, 
shapeless lumps, visible only under the microscope, to worms which 
could be seen with the naked eye, about 1 mm. long, and furnished 
with suckers, cuticula, and calcareous particles. 
The creatures were always found in the same part of the cavity of 
the body of the Cyclops, viz. above the intestines, and, in fact, the 
larger specimens filled the whole space between the eye and the 
abdomen, and often penetrated into the latter, but always lay so that 
the suckers were in the anterior part of the Cyclops. NoWithstanding 
that such a considerable portion of the bodily cavity was taken up 
