10 AKT. 4.— BASHFORD DEAN. 



denoted by letters, since they have not as yet been compared 

 satisfactorily with those of other chimaeroids. The cartilages are 

 connected with the skin by fascia : their other attachments are es 

 follows : 



Attachment. 

 Element. 



A Attached to anterior dorsal as well as to caudal arm 



of the element C, articular! y to B., and posteriorly to the 

 skin and skull by muscles. 



B With A strengthens the integumenta! fold forming 



the outer angle of the mouth. From an antero- ventral 

 eminence this plate supports a loose fold of the margin of the 

 lip. This eminence forms also in part the posterior support 

 for the broard under lip, which depends notably from the 

 jaw. B' and B" are small elements closely related to the 

 ligaments attached to the ventro-posterior arm of B. 



G Connected by ligaments with the anterior projecting 



pair of cartilages, forming in connection with the latter 

 a mechanism which raises or depresses the whole labial 

 apparatus. Connected ventro-mesad with the dorsal rim of 

 the folding pair of cartilages E-F ; ecto-distad, by muscle 

 and ligament, to D ; attached, also, along extended hinder 

 (caudad) rim, mainly ectal, to A. Its hinder arm, the 



C element C, attached proximad to skull by strong ligament 

 (near and dorsal to the posterior nasal opening). 



I) Connected anteriorly with C. Its posterior arm, 



enveloped in a loose marginal fold of the skin, passes outside 



the angle of the mouth. 



E, F E and F together (with hinge joint) form the rim of 



the nasal opening, a movable arm constituting the septum 



