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297 



Notes absence of blood-corpuscles in Amphioxus. Those 

 described by previous authors must therefore require another ex- 

 planation. 



21 DoHRX, Anton. Stiidioi zur Urgeschichte des M'irbelthier- 

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22 EiSlG, Hugo. Die Segmentalorgane der Capitellidoi. Mitth. 

 Zool. Stat. Neapel. I. 1879. PP- 93-iiS. Taf. IV. 



Discovery of numerous nephridia in single segments and an- 

 astomoses between successive nephridia. 



23 E-MERY, Carlo. Le specie del genere Fierasfer nel Golfo di 

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24 Emery, Carlo. Zur Morphologic der Kopfniere der Teleostier. 

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25 FusARl, Ro-MEO. Beitrag zum Stttdiuvi des periplierischen 

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 Taf. VII.-VIII. 



26 GoODSiR, John. On the Anatomy of Amphioxus lanceolatus . 

 Transactions of the Royal Society of Edinburgh, Vol. XV. Part I. 

 1841. pp. 241-263. 



27 Grenacher, H. Beitrdge zur ndhern Kenntniss der iMiiscu- 

 latur der Cyclostomen und Leptocardier. (Leptocardia proposed 

 by Haeckel as a classificatory name on account of the simple 

 tubular "heart" of Amphioxus.) Zeitschr. fUr Wiss. Zoologie, 

 XVII. 1867. pp. 577-597. Taf. XXXVI. First isolation of 

 muscle-plates of Amphioxus. 



28 GiJNTHER, Albert. Synopsis of Genus Branchiostoma. In 

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 33. London, 1884. 



29 Hatschek, Berthold. Die Metanierie des Amphioxus und 

 des Ammoccetes. Verb. Anat. Gesellschaft, 6th Versammlung. 

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29 bis. Hatschek, Berthold. Zur Metamerie der Wirbelthiere. 



Anat. Anz. VII. Dec. 1892. pp. 89-91. 



30 Huxley, T. H. Preliminary Note upon the Brain and Skull 

 of Amphioxus lanceolatus. Proceedings of the Royal Society, 

 XXIII. 1874. pp. 127-132. 



Points out that in Afyxine and Ammocostes a velum is present 

 separating the buccal (stomodcealj from the branchial cavity. 



