


1891.] Zoology. 1131 
ZOOLOGY. 
Preservation of Color in Animals in a Collection.—M. 
Richard Thorna, of Dorpat, Russia, believes that he has discovered a 
liquid that will preserve the natural color of zoological specimens. 
After washing, the animal is to be preserved in the following solution : 
Sulpnate OF S608 -o a a tas ce AO Cree, 
Chloride of sodium. Peat a eR wees fo 
Chlorate of potak o og pay, ae rooe 
Dittate gf potash soar vo oe io Sod 
OE RISE SE OREO E PO E RE 1 litre. 
The specimen must remain in the liquid from eighteen to twenty- 
four hours, after which it is*to be put in alchohol, which must be 
changed once or twice. Animals so treated will keep their color, the 
tints of which will be slightly deepened. (Revue Scientifique, 27 
June, 1891.) 
The Structure of Serpula.—Mr. A. L. Treadwell describes! 
some points in the structure of the New England Serpula dianthus. He 
first points out that Professor Verrill in his original description has 
confounded dorsal and ventral surfaces in this worm, and then pro- 
ceeds to describe the general structure of hypodermis, nervous system, 
tubiparous glands, and sex products. The digestive, muscular, and 
circulatory apparatus, etc., are much like those in Spirographis, de- 
scribed by Claparéde, and hence are omitted. Most noticeable is the 
nervous system, in which the cesophageal commissures are double, the 
upper commissure on each side being almost entirely composed of 
nerve-cells. The much convoluted tubiparous glands lie in the firs 
body segment, and extend backwards to about the middle of the 
second segment. 
Metamerism in Hexapods.—As a ak of studies on the 
embryology of the cockroach, Professor Aug. Lameere, has arrived at 
the following conclusions : 2 The order of succession of the mouth parts 
as given by Savigny is accepted. In the head four pairs of ccelomic 
cavities are recognized, plus a median unpaired cavity, corresponding 
to the labrum which the author would homologize with the cavity of 
the anterior directions of the Actinozoa. The antennule of the Crus- 
1 Zool. Anz., XIV., 200, 1891. 
2 Bull. Soc. Micros., Belg., XVII, 1891. 

