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lymphatic nodes and furthermore that he also accepted the view that 
a complete series of transition forms exist between lymphatic nodes 
and the spleen. Dayron also reported having noticed appearances 
which favor the view that hemal nodes develop from fat lobules but 
he neglected to state what these “appearances” were. 
Vincent and Harrison (29) also reported the finding of hemal 
nodes in dogs. Regarding these findings Vincent (28) says: “My 
investigations, undertaken in conjunction with Spencer Harrison upon 
the hemolymph glands led to the observation that there were in dogs 
and rats glands which differed little on casual observance from ordi- 
nary lymphatic glands. They show, however, blood-red patches on 
the surface, and examined microscopically are found to contain more 
or less extensive blood-sinuses. These glands are found in different 
regions of the abdomen but chiefly in the dog upon the branches of 
the coeliac axis.” In a footnote Vincent adds: “Haemal lymphatic 
glands may also be found occasionally in other parts of the dog viz. 
the axilla and neck.” These investigators also spoke of glands in the 
dog and rat which looked like lymph glands but which contained 
blood sinuses, and concluded that hemolymph glands are modified 
lymph glands and develop from them. 
Wartutn (30) stated that two classes of hemolymph nodes, the 
hemal and the hemolymph nodes, appear to be restricted to carnivora, 
but on the other hand, Lewis (15) to whom Warruin referred, stated 
that in dogs all glands are of the hemal lymphatic tyye but that in 
rodents only hemal glands are found. Lewis also added that he failed 
to find any definite lymphatic vessels in the nodes of the rat, that 
the same observation applies to hemal nodes in general, and that 
although hemal and hemal lymphatic glands are the main blood de- 
stroyers in the body, polymorphonuclear cells are not destroyed in the 
hemal glands of rodents. Lewis also found marked phagocytosis present 
in the hemal glands of the cat and rabbit and in what he termed 
hemal-lymphatic glands in the dog and claimed that injections made 
on dogs and cats showed that the sinuses were in connection with 
both the vascular and lymphatic systems. 
Moranpr and Sisto (18) also stated that numbers of hemolymphatic 
glands are found constantly in the dog in regions in which lymph 
nodes are found and that the structure of the hemolymph glands of 
the rabbit is very similar to those of the dog. WEIDENREICH (32), on 
the contrary, stated that rabbits have no hemal glands but implies 
