TABLE OF CONTENTS. 



INTRODUCTION 9 



HISTORICAL REVIEW II 



GENERAL FEATURES, METHODS, 



ETC 19 



External Characteks 19 



Internal Anatomy' 19 



Methods 22 



Occurrence 23 



Mode of Life, Food 24 



Color, Size 25 



Length Index 26 



COMPARATIVE ANATOIMY .... 26 



Foot and Gi.andk 26 



HyPODERMI.S and PRODUCTd .... 27 



Spicule Development 2S 



DiQE-STiVE Tract 32 



Muscular Sy.stem 32 



Primary Body Cavity and Septa . . 33 

 Circulatory and Re.spikatouv Sy.s- 



tems 33 



Nervous System 34 



Sense Organs 36 



COELOM 37 



Physiology 3S 



CLASSIFICATION 41 



Aplacopiiora 42 



Chaetodermatidiic 42 



Chaetodcrma 43 



Limifossor 44 



Neomeniidae 44 



Drepanomcnia 44 



Pachymoiiia 45 



Proneomcniidac 45 



Proncomenia 45 



Driomenia 45 



Dorymcnia 46 



Strophomenia 46 



Pruvotiniidae 47 



Lophomenia 47 



Alexandromenia 47 



Halomenia . 

 Dondersiidae 

 Herponienia 

 Dondersia . 

 Iclithyomenia 

 DESCRIPITON OF SPECIES 



Chaetodernia hawaiiensis 



C. attcnuata 



C. erudita . . . 



C. montereyensis . 



C. argentea . . 



C. soabra . . . 



C. californica . . 



C. nanula 



C. japonica . . . 



C. robusla . . . 



Limifos.sor talpoideus 



L. fratula .... 



Pacliymenia abyssoruin 



Dix'panomt'iiia vampyrclla 



Pruncomonia liawaiiensis 



P. iiLsularis 



Driomenia pacifica 



Dorymenia acuta 



Strophomenia scanden 



S. ophidiana 



S. regularis 



S. farcimcn 



S. spinosa 



S. lriangulari.s 



Lophomenia spiraHs 



Alexandromenia agassizi 



A. valida .... 



Halomenia gravida 



Herpomenia platypoda 



Dondersia californica 



Ichthyomenia porcsa 

 GENERAL CONSIDERATIONS 

 HIBLIOGRAPHY .... 

 EXPLANATION OF PLATES 



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