(749 ) 
XXX.—A Monograph on the general Morphology of the Myxinoid Fishes, based on a 
study of Myxine. Part I. The Anatomy of the Skeleton. By Frank J. Cole, 
B.Sc. Oxon. Communicated by Dr R. H. Traquarr, F.R.S. (With Three Plates.) 
(MS. received June 3, 1905. Read June 19, 1905. Issued separately September 25, 1905.) 
CONTENTS. 
PAGE PAGE 
A. Introduction. : ; : ; ; . 749 | H. Basal Plate ; ; ‘ ‘ ; : 5 agi 
B. Notochord . é ; j ; . 750 | I. Dental Apparatus. . 774 
C. Cranium and Neural Tube : : : . 754 | J. Skeleton of the Velum or Pharyngeal Valve 5 aut 
D. Histology of the Skeleton . : : : . 754 | K, Skeleton of the Club-shaped Muscle 3 . 00g 
E. Cranio-pharyngeal Framework . : : . 759 | L. Branchial Skeleton . : : : . 780 
F. Nasal Tube and Capsule . : ; . 766 | M. Skeleton of the Tail : F ; : . 783 
G. Tentacular Apparatus . 2 : : . 769 | N. Explanation of the Plates . : ; f . 186 
A. INTRODUCTION. 
The present work was commenced in the summer of 1902, with the object of writing a 
complete monograph of the morphology of Myxine. It had previously been undertaken 
by the late Professor G. B. Howss, F.R.S., but, owing to the pressure of other work, and 
the first indications of the illness which subsequently proved fatal, he handed the work over 
tome. During the earlier stages, however, he exhibited a characteristic interest in the 
research, and most generously placed his material and the late Dr PotLarp’s sections at 
my disposal. His death has removed a kindly and a stimulating figure from our midst ; 
a man whose life was devoted to the service of his friends and the advancement of his 
favourite study, and whose generous and sympathetic nature was the wonder and the 
delight of all who knew him. 
The work had not been long i in progress before it became evident that it was much 
too extensive for publication as a single monograph. I therefore determined to issue it 
in parts, following the example of the illustrious founder of our knowledge of Myxinoid 
Anatomy—J. Miiirr. These parts will relate simply to the anatomy of Myzxine, and 
will only take cognisance of such literature as contains original observations of Myxinoids. 
I have prepared an exhaustive Myxinoid bibliography, which will be published with my 
final part, so that in the meantime I need only direct attention to the papers on the 
skeleton mentioned below.* The anatomical parts will be followed by a separate con- 
* The following works relate to the skeleton generally, those dealing with special points being referred to at the 
appropriate places :—A. A. Rerzius, Kgl. Vet. Akad. Stockholm, 1824; J. Munurr, Abh. K. Akad. Wiss. Berlin, 
1834; P. Furprinemr, Jena. Zeits., ix., 1875; W. K. Parker, Phil. Trans., 1883; G. B. Howns, Trans. Liv. Biol. 
Soc., vi., 1892 ;, Neumayer, Munchen. med. Abhand. (KuprFeR and Rtpineur), Hft. 74, 1898; AymeRs and Jackson, 
_ Jour. Morph., xvii., 1901, and Bull. Cincinnati Univ., vol. i., 1900; Autis, Anat. Anz, xxili., 1903. 
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