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the stage is remarkably large and substantial, and is so firmly 
mounted that it affords efficient support for the hands 
during the manipulation of an object under the Microscope. 
The stand does not possess the usual axial joint; but inasmuch 
as that portion of the tubing which carries the eye-pieces is 
bent at almost a right angle with the perpendicular portion 
of the body which carries the objective, the axial inclination 
of the stand is unnecessary. The binocular prism is remark- 
ably well ground and set, and under it, objects of considerable 
thickness, such as injected specimens, stand out in relief, 
much in the same way as they appear under the Wenham’s 
binocular. The instrument is capable of being used bino- 
cularly with high, equally well as with low powers; the 
prism acts as an erector, and when used in combination with 
a ‘^combined two and four inch objective,” recently invented 
by Zeiss, it forms a most useful dissecting miscroscope. 
Dr. Tatham bore testimony to the great comfort he has 
experienced in the use of this form of binocular, and augured 
for it an extensive sale, more especially as the price of the 
binocular, stand complete, does not exceed seven or eight 
pounds. 
Mr. Mark Stirrup, F.G.S., read some notes on the 
Mollusca of Blackpool — the more noteworthy species being 
Scalaria Turtonse. 
Scalaria communis. 
Cyprina Islandica. 
Pholas crispata. 
Mr. J. Boyd read some notes on the Haustellum of the 
Haustellata, with diagrams, and also exhibited some micro- 
scopical slides illustrative of the subject. 
