TABLE OF CONTENTS. 



Plates I- VI II . Development of the 'i{'YT)T.r:zr\j\.. Figures from Alexander AoAssrz, Louis Agassiz, Geo. 



J. Allmax, Cap.l Chun, J. Walteii Fewkes, H. Ful, E. ILeckel, Nicolaus Kleixexbekg, G. von 

 Koch, A. Kowalevvsky, John McCuadv, E. Metschxikoff, and P. E. Mui.leu. 



Plates I., II., III., IV., and V. Dcvclop-nunt of (]ic'i\\x>TMix>A.. 



From NicoLATJS Kleinenberg. 

 " Geo. J. Allmax. 

 " Louis Aoassiz. 



" Geo. J. Allman. 



" Louis Aga.s.siz. 



" Geo. J. Allmax. 



" Loi;is Arassiz. 



" A. Kowalewskt. 



" G. VON Koch. 



" E. Metschxikoff. 



" John McCradt. 



" E. H.ECKEL. 



■' H. FoL. 



" E. H.ECKEL. 



" J.Walter Fewkes. 



" Geo. J. Allm.\n. 



" J. Walter Fewkes. 



" Alexaxder Agassiz. 



" .1. Walter Fewkes. 



" Alexander Agassiz. 



" Geo. J. Allmax. 



" J. Walter Fewkes. 



Plates VI. and VII. Devclopmcit of the Discoidea and Sipiioxophora. 



Plate VI. — 1-4 Physalia. and l^elella 



5-7 Rataria ..... 



8, 9 Por2nla and Velella 



10-19 Epibulia, Glcba, Halistcmma, and Agahnopsis 



20-23 Physophora magnijica 



24 Praya ..... 



25 Diplophyaa incrmis . , . 

 26, 27 Diphycs Sieho/dii 



28 Eadojm Lesmnii .... 



29-31 Eudoxia, Monophycs, and Muggima 



From Alexaxder Agassiz. 



" J. AValter Fewkes. 



" Alexaxder Agassiz. 



" E. Metschxikoff. 



" E. H.ECKEL. 



" E. Metiscuxikoff. 



" J. Walter Fewke.s. 



" P. E. MilLLER. 



" J. Walter Fewkes. 



" Carl Chux. 



