337 



in the two branches into which each of the two arteries, formed by 

 the anterior bifurcation of the "vertebralis impar capitis", separate. 

 These two arteries supply the brain, the trigemino-facialis ganglion, 

 and the eye, but they were not carefully traced. 



The arteries in my embryo, and probably those in the adult also, 

 thus give no indication as to whether certain anterior clefts have dis- 

 appeared or not. The nerves and muscles of the adult, and the clefts 

 of the embryo, taken all together seem, however, to more than simply, 

 indicate, though perhaps not to definitely establish: that Parkfr was 

 right in his identification of the ceratohyal; that the "prae-facialis" 

 part of the teleostean hyomandibulo-symplectic is represented in that 

 part of the hyomandibulo-symplectic (Parker) cartilage of Bdellostoma 

 that is composed of hard cartilage; and that the "post-facialis" part 

 of the same element is represented in what Parker considered as the 

 first branchial arch of the fish. The palatine, as already stated, seems 

 to be represented in the lateral labial cartilage of Ayers and Jack- 

 son's descriptions; and it is important to recall that this cartilage is 

 bound by a strong ligamentous band to the cornual cartilage, this 

 band naturally representing some one of the ligamentous bands that, 

 in Teleosts, connect the palatine with the ethmoidal region of the skull. 



In this connection, it is important to note three cartilaginous pro- 

 cesses that I find in Conger conger. Two of these processes arise from 

 the antorbital cartilage, are long and slender, and project horizontally 

 forward, one from the ventral and the other from the lateral part of 

 the cartilage. The lateral process rests directly upon the underlying 

 palatine cartilage, and extends forward lateral to the nasal sac. The 

 ventral process lies close against the side wall of the internasal part 

 of the skull, and lies ventro-mesial to the nasal sac. The third pro- 

 cess arises, slightly dorsal to the anterior end of the ventral process, 

 from the side wall of the internasal part of the skull, and extends 

 forward, close against the bony skull, to its extreme anterior end. 

 In the youngest Congers that I have, this cartilage connects at its 

 hind end, by a short vertical cartilage, with the anterior end of the 

 ventral rod of cartilage. That some one of these processes represents 

 the cornual cartilage of Bdellostoma, and that the others may represent 

 certain of the tentacular cartilages seems evident, but I am not able 

 as yet to definitely homologize them. 



Palais Carnoles, Menton, 

 March 28th 1903. 



Anat. Anz. XXIII. Aufsätze. 99 



