352 NOTES. 
mother and return to her again, up to twenty-eight days, when they‘ 
become independent. 
In a note appended to M. Chantran’s paper, M. Robin states, that “the 
young are suspended to the abdomen of the mother by the intermediation 
of achitinous hyaline filament, which extends from a point of the 
internal surface of the shell of the egg as far as the four most in- 
ternal filaments of each of the lobes of the median membranous plate 
of the caudal appendage. The filaments exist when the embryos have 
not yet attained three-fourths of their development.” Is this a larval 
coat? Rathke does not mention it and I have seen nothing of it in 
those receutly hatched young which I have had the opportunity of 
examining. 
Note VIIL., CHAPTER IL, p. 64. 
THE “SALIVARY ” GLANDS AND THE SO-CALLED “ LIVER” OF 
THE CRAYFISH. 
Braun (Arbeiten aus dem Zoologisch-Zootomischen Institut in 
Wiirzburg, Bd. II. and III.) has described “salivary” glands in the 
walls of the oesophagus, in the metastoma, and in the first pair of maxillz 
of the crayfish. 
Hoppe-Seyler (Pfliigers Archiv, Bd. XIV. 1877) finds that the yellow 
fluid ordinarily found in the stomachs of crayfishes always contains pep- 
tone. It dissolves fibrin readily, without swelling it up, at ordinary tem- 
peratures; more quickly at 40° Centigrade. The action is delayed by even 
a trace of hydrochloric acid, and is stopped by the addition of a few drops 
of water containing 0.2 per cent. of that acid. By adding alcohol to the 
yellow fluid, a precipitate is obtained, which is soluble in water and in 
glycerine. The aqueous solution of the precipitate has a strong digestive 
action on fibrin, which is arrested by acidulation with hydrochloric acid. 
These reactions show that the fluid is very similar to, if not identical 
with, the pancreatic fluid of vertebrates, 
The secretion of the “liver’* taken directly from that gland, has a 
more strongly acid reaction than the fluid in the stomach, but has 
similar digestive properties. So has an aqueous extract of the gland, 
and a watery solution of the alcoholic precipitate. The aqueous extract 
also possesses a strong diastatic action on starch, and breaks up olive oil. 
There is no more glycogen in the “liver” than is to be found in other 
organs, and no constituents of true bile are to be met with, 
