MUSCLES OF CERATODUS 359 



Spinax niger, Protopterus annectens, Ceratodus forsteri, et Axolotl ", 



' Archives med. Bucarest ', torn, ii-v.^ 

 ^ Kellicott, W. E. (1905). — " The development of the Vascular and Respira- 

 tory Systems of Ceratodus ", ' New York Acad. Sc. Memoirs ', vol. ii, 



part 4. 

 Maurer, F. (1912). — " Untersuchungen iiber das Muskelsystem der Wir- 



beltiere ", ' Jenaische Zeitschr.', Bd. xliv, Heft i. 

 xNeumeyer, L. (1904).— " Entwickelung des Darmkanales, von Lunge, 



Leber, Milz, und Pankreas bei Ceratodus Forsteri ", ' Semon's For- 



schungsr.', Bd. i. Lief. iv. 

 •^ Owen, R. (1840). — "Description of the Lepidosiren annectens", 'Trans. 



Linn. Soc.', vol. xviii, part iii. 

 ^ Pinkus, F. (1895). — " Die Hirnnerven des Protopterus annectens ", 



' Schwalbe's Morph. Arbeiten ', Bd. iv. 

 " Sewertzoff, A. N. (1902). — " Zur Entwickelungsgeschichte des Ceratodus 



forsteri ", ' Anat. Anz.', xxi. 

 ' Semon, R. (1901). — ' Normentafel zur Entwicklungsgeschichte des 



Ceratodus forsteri ', Jena. 

 Wiedersheim, R. (1904). — " Ueber das Vorkommen eines Kehlkopfes bei 



Ganoiden und Dipnoern sowie iiber die Phylogenie der Lunge ", ' Zool. 



Jahrb.', Suppl. vii. 



NOTE. 



On the development of the Quadrate and 

 Epihyal. 



The Hyomandibula of Ceratodus was first described by- 

 Huxley (1876), who stated that it is a small four-sided cartilage 

 with a short conical process at its antero-ventral angle. This 

 process is embedded in the dorsal and posterior part of the 

 hyosuspensorial ligament. 



The cartilage was subsequently described by v. Wijhe (1882), 

 who identified it with a Hyomandibula, or possibly an Inter- 

 hyal. 



Eidewood (1894) stated that the hyosuspensorial ligament 

 passes from the top of the Ceratohyal to a protuberance of 



^ The only copy of this in the United Kingdom that I know of is in the 

 Library of the Royal College of Surgeons, Lincoln's Inn Fields. 



B b 2 



