TABLE OF CONTENTS. 



MORPHOLOGY. 



I. — Genekal Introduction, 



II- — The Centeo-Dorsal and Calyx, 



A. The Centro-dorsal, 



Inferior Surface, . 



Superior Surface and Interradial Symmetry 



External Form, 



Obliteration of Cirrus-Sockets, 



B. The Chambered Organ, 



C. The Rosette, .... 



Basal Star, 



D. TheRadials, .... 



Radials of Antedon, 

 Radials of Actinometra, 



E. Abnormal Conditions of the Rays, 



III. — The Geographical and Bathymetrical Distribution of the Comatul^e, 

 Thaumatocrinus, Promachocrinus, and Eudiocrinus, 

 Antedon, Ten-armed Species, 

 Antedon, Multibrachiate Species, . 

 Actinometra, ..... 



IV. — The Geological History of the Comatul^;, 



V. — Classification, ..... 



General Rules of Co?reatfu/a-strueture, 

 Methods of Formulation, 



List of Antedon Species, .... 

 List of Actinometra Species, 



VI. — Description of the Specimens, 



Family Comatulidre, .... 



Definition of Genus Tliaumatocrinus, . 



Thaumatocrinus renovatus, P. II. Carpenter, 

 Definition of Genus Atelecrinus, 

 Synopsis of the Species, 

 Atelecrinus balanoides, n. sp., 

 wy villii, n. sp., . 



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