258 



a vertical section of about 1 or 2 mm. The ends of these arches are 

 cut off as far as necessary by a file or sharp steel-knife and the arches 

 being put across the body of the animal at different points (Fig. lis) 

 are pasted, on their ends (Fig. 12a), to a glass plate. 



The arrangement can be made fare more elegant by boring corre- 

 sponding holes into the surface of the plate and putting the ends of 

 the arches into them. Besides it would be very advantageous to heat 

 the ends of the arches in a flame and to press them when melted 

 against a plate of iron, in consequence of which the ends of the arches 

 become flat (Fig. 1 3 a) and every arch has two feet. The latter can easier 

 be pasted to the glass plate than the ends when not enlarged. Finally 

 we could take thin glass rings (Fig. 14) of different sizes which are 



Fig. 14. 

 Fig. 12. -Fig. 13. 



ground off on one side (Fig. 14«). The rings thus arranged are desig- 

 ned to be put on different parts of the body of the animal and the 

 plained sides of the rings are to be pasted to the glass plate. 



5) In conclusion I shall add a method of arranging specimens 

 without alcohol or any other preservative fluid. 



Many specimens are of such small a size as to be visible to the 

 naked eye only in close proximity. If these specimens, therefore, 

 are placed into glass cases, they preclude inspection. Hence the ob- 

 ject is dyed to saturation by carmine and treated afterwards like an 

 ordinary microscopical specimen, t. i., it is brought seriatim in abso- 

 lute alcohol, xylol or turpentine, and finally closed permanently by 

 Canada balsam. But instead of a glas strip intended to serve as the 

 object glass we have to take a large plate of milky glass. The speci- 

 men thus prepared can be seen from a larger distance , as red and 

 white are good contrasts. This arrangement allows even the inspec- 

 tion of the minute trichina taken from the intestines. 



The plate of milky glass can be placed on an easel into a glass 

 case. 



Paris, April 15th, 1892. 



2. Zoological Society of London. 



Hth June, 1892. — The Secretary read a report on the additions that 

 had been made to the Society's Menagerie during the month of May, 1892, 



