64 ALLEN 



Duvernoy). Vogt states that he has succeeded in injecting the 

 inferior jugular from the common branchial canal (Fig. L ; 63). 

 A somewhat similar arrangement is shown for the fourth arch ; 

 the two branchial components unite in a common stem that anas- 

 tomoses with a large trunk coming from the middle <3f the body 

 and finally ends in the cephalic sinus as described under the 

 abdominal sinus. Stannius (24, p. 254) says that lymphatic 

 vessels arise from the branchial arches and empty into a trunk 

 running in the canal of the arches. Trois (28 and 29) always 

 found a branchial trunk in the groove of each arch in Lo^phms 

 and Uranoscoftus, which received branches arising from net- 

 works in the arches and in the filaments. The filament net- 

 works are represented as being much finer and necklace-shaped, 

 while those of the arch are irregular and much coarser. In 

 connection with Uranoscoptis (29, p. 26) the author states that 

 Fohman (4) is the only one having described these branchial 

 lymphatic vessels, and attributes the fact that they have not been 

 discovered by other investigators to their faulty method of pro- 

 cedure, namely, of immersing the specimen in alcohol. 1 



Miiller (15) and Stannius (24) have shown a somewhat similar 

 arrangementof branchial vessels under the head of vencentitritice, 

 and in a previous paper of mine (2) both dorsal and ventral 

 nutrient branchial veins were figured and described ; the former 

 emptied into the jugular and the latter into the inferior jugular. 

 These vessels received branches from the arches and the filament 

 nutrient veins, which arose from a capillary network in the fila- 

 ments. This network could easily be distinguished from the 

 regular gill network on account of its different arrangement 

 and its much coarser meshes. 



In not being able to find lymphatic vessels arising from the 

 gills and the branchial arches I am not disposed to contradict 

 their existence, for I can see no reason why the gills should 

 not possess lymphatics. 



'In this connection, would state that I see no objection to preserving an 

 Injected specimen in alcohol or formalin for future reference. I have kept 

 injected material in formalin for years in as perfect shape as when first injected, 

 and upon writing up a description find them of greater value than reference 

 figures or mere memory. 



