354 Anatomy and Physiology of the Family Nepide. 
Connected with the salivary system, but separate fon k 
glands, are two sigmoid pouches, called salivary reservoirs, whid 
are supposed to serve for storing larger quantities of saliva. The 
are applied to each side of the stomach, at its commencemest 
and are continued backwards by a tubular appendage, which eå 
blindly in the first abdominal segment, being there attache! 
the stomach and to the large salivary gland by tracheary three 
The ducts of the reservoirs are kept open by a trans 
ated ribbon, coiled in a spiral manner, and thus are si ! 
tracheæ in structure. i 
The salivary glands are coud and, thete ir 
order. The globules are closely packed,- sessile, and 
upon tubules, which join with others of like origin, and 
their contents into a common duct. 
Comparatively speaking, the glands in Ranatra are nota T 
as those of Belostoma, and the salivary pouches, at the wit 
are lacking. The salivary reservoirs are lenticular, 
cecal appendages are longer than in Belostoma, : 
The Malpighian Tubules—-The Malpighian ete 
from their discoverer, Malpighi, are appended to” the 
They consist of two tubules, of small and uniform size, 
four insertions to the bulbous enlargement of the inte i 
insertion is mediate, 7. ¢., connected with a pouch 
extending also over the stomach and into t 
count of the difficulty with which they are U ae g 
E of their tengt we been mane F 
acid and ie urinary products — Se 
them a urinary function. It is nie chat sort 
unite with this urinary function the secretion 0 ® 
opinions of anatomists of the past half century res 
tion are various, By Cuvier, Dufour and eo yee 
uss-Dirckt 
believed to be biliary, and by Stra iene were, i 
omists urinary, These contrary opi 
reconciled by the views of Lapopiattss who 
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