Nos. IAND2.] COTYLASPIS INSIGNIS. 21 



The still smaller subdivisions of the excretory systems may be 

 called the capillaries (Fig. 24). They can be seen dividing and 

 when followed out to terminate in lesser divisions terminating 

 finally in flame-cells. I have not been able to see these vessels to 

 my entire satisfaction, but in places they are clearly visible. I 

 have never seen them entering any vessels other than the anterior 

 and posterior forks of the recurrent vessel. They do not appear to 

 branch trichotomously, as they are thought to do in Aspidogaster 

 by Stafford. I have not seen any indications of anastomoses 

 between these or any of the parts of the excretory system, though 

 such are found by Nickerson in Stichocotyle, and are mentioned 

 by Braun '93 as being general in the order. These capillaries were 

 flagellated, as are the larger vessels into which they run, but their 

 tributaries, the ultimate capillaries, do not appear to be so. I 

 have repeatedly examined them with an immersion lens, without 

 finding flagella or cilia in the vessels, though they .were seen 

 distinctly in the flame-cell adjoining and in the capillary beyond. 

 The flame-cells (Fig. 27) are funnel-shaped, small and very indis- 

 tinct. They are 10 fi in length and 7 fx broad at the wide end and 

 hollow within, where I could see a lining of numerous small active 

 cilia, quite different from the large flagella of the vessels farther 

 down. In appearance the flame-cells bear considerable resem- 

 blance to those found by Looss '92 in Amphistouinm clavatinn, and 

 indicated in his figures 2 and 19. He states that the funnels in that 

 species are open at the end and that the capillary leading from it 

 is not ciliated, but the similarity ends here, as in Amphistomum, 

 several of the non-ciliated capillaries meet and empty into a much 

 larger ciliated vessel. 



k. The Nerv^ous System, and Sense Organs. 

 My knowledge of the nervous system is as yet very incomplete. 

 There is a transverse commissure crossing above the pharynx 

 (Figs. 3, 5 and 6). This runs down on each side of the pharynx 

 and then branches, each giving rise to an anterior and a posterior 

 branch. There is no considerable enlargement of the mass of 

 nervous material at the meeting place of these trunks (Fig. 28), 

 1. e., no ganglionic concentration of nervous tissues. The anterior 

 trunk is short and it soon disappears in the parenchyma of the 



