352 



The second tentacle lies above the first and is in connection by 

 a cartilaginous bar with the rootpiece of the third tentacle and the 

 anterior lateral piece of the „Zungenbein" (W. f. Müller). To the base 

 of this tentacle, but not fusing with it, extends the process from the 

 skull which Müller calls the „Knorpelfortsatz am vorderen Ende der 

 Gaumenleiste", the Processus spinosus of Fürbringer or Prepalatine 

 of Parker '). From its topographical relations I take this to be the 

 rootpiece of the second tentacle which has given up its connection 

 with the latter, a new connection having been formed. Furthermore 

 the prepalatine piece is perfectly continuous with the skull. The 

 sensory nerve supply is by the R. maxillaris (6' of Müller). This 

 tentacle may be termed the maxillary tentacle and for the rootpiece 

 the name prepalatine may be retained. 



Mx. tent. R. mx. Pmx. piece 



• R. ophth. prof. 

 Prepal. 



Pmx. tent 



| Root piece 



Coronoid. tent. 



Mental, tent. ' 



R. submand. Zungenbein 



Fig. 3. Tentacles and sensory Nerves of Myxine. 



The relations of the third tentacle have been described above. 

 To it I give the name coronoid, the rootpiece is the coronoid piece 

 and the nerve the coronoid nerve. 



3) W. K. Paekeb, On the skeleton of the Marsipobranch Fishes, 

 Phil. Trans., Part II, 1883. 



