56 



Bibliografia. 

 EiiPATiBWSKY, W., Die Entwickelungsgeschichte der Genitalprodukte bei 



Sagitta. 1. Die Ent Wickelung der Eier. Biol. Zeitschr. Vol. 1, 1910. 

 Haeckeb, v., Die Keimbahn von Cyclops. Arch. Mikr. Anat. Bd. 45, 1897. 

 HEeNER, R. W., The Effects of Removing the Germ-Oell Determinants from 



the Eggs of some Chrysomelid Beetles. Biol. Bull. Vol. 16, 1908. 

 Heqneb, R. W., The Origin and Early History of the Germ Cells in some 



Chrysomelid Beetles. Journ. Morph. Vol. 20, 1909. 

 Hegneb, R. W., Studies on germ cells. III. The origin of the Keimbahn — 



Determinants in a parasitic Hymenopteron, Copidosoma. Anat. Anz. 



Bd. 46, No. 3/4, p. 51. 

 Kahle, W., Die Paedogenese der Cecidomyiden. Zoologica Vol. 21, 1908. 

 NoACK, W., Beiträge zur Entwickelungsgeschichte der Museiden. Zeitschr. 



f. wiss. Zool. Bd. 70, 1901. 

 Rittee, R., Die Entwickelung der Geschlechtsorgane und des Darmes bei 



Chironomus. Zeitschr. f. wiss. Zool. Bd. 50, 1890. 

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siti. I. Biologia del Litomastix truncatellus (Dalm). Ann. R. Sc. Agr 



Portici Vol. VI (1906) e Boll. Labor. Zool. R. Sc. Agr. Portici Vol. I. 

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(Dalm.). III. Sviluppo dell' Encyrtus aphidivorus Mayr. IV. Sviluppo del- 



l'Oophthorasemblidis. Boll. Lab. Zool. R. Sc. Agr. Portici, Vol. Ill, 1908. 

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Nachdruck verboten. 



The Trigemino-facialis Chamber in Amphibians and Reptiles. 



By Edward Phelps Allis, jr., Menton, FraEce. 



In all descriptions of amphibians with which I am familiar, the 

 trigeminus and facialis ganglia are always said to lie either in the 

 foramina of their respective nerves or immediately external to those 

 foramina and hence on the outer surface of the chondrocrailium. 

 Because of this I have always considered the trigemino-facialis chamber 

 of my descriptions of fishes to be wholly wanting in amphibians, and 

 this has always seemed to me a most marked and wholly unaccount- 

 able difference in these two classes of lower vertebrates. My recent 

 work on Ceratodus (Allis, 1914 b) has however led me to conclude 

 that the outer wall of the chamber of fishes must be represented in 

 some part of the palatoquadrate of amphibians, and reference to the 



