Nemerteans of the West n?id A'orthwest Coasts of North America. 



By Wesley K. Coe. 



CONTENTS. 



PAGE. 



[iitioduction 



(ieneral characters of the Ne- 

 merteans . . . . 



A natomical and histological 

 structures, with special ref- 

 erence to the Pacific coast 

 species 



Integument 

 Basement layer and cutis 

 Musculature . 

 Connective tissues and 



parenchyma 

 Cephalic and submuscu 



lar glands . 

 Caudal cirrus 

 Alimentary canal . 

 Proboscis and proboscis 



sheath 

 Proboscis 



Blood vascular system 

 Nephridial system 

 Nervous system 

 Sense organs 

 Reproductive organs 

 Development 

 Geographical distribution 

 Systematic position and rela 



tionships . 

 Literature relating to Nemer 

 teans of the Pacific coast 

 Species new to region 



1 

 4 



8 

 10 

 12 



U 



15 

 18 

 19 



27 

 31 

 ■■V.) 

 42 

 47 

 54 

 (i2 

 71 

 75 



81 



85 

 8i) 



Distribution of the Pacific 



coast species 

 Keys to groups and species 

 Systematic account of the gen- 

 era and species, with de- 

 scriptions of new species 



Carinella 



Carinomella . 



Carinoma 



Cephalothrix . 



Taeniosoma . 



Zygeupolia 



Linens . 



Euborlasia 



Mi crura 



Cerebratulus . 



Emplectonema 



Zygonemertes 



Nemertopsis . 



Paranemertes 



Carcinonemertes 



Amphiporus . 



Drepanophorus 



Tetrastemma 



Planktonemertes 



Malacobdella 



Nectonemertes 

 Bibliography 

 Errata 

 Index . 

 Explanation of plates 



r.vGK. 



91 



94 



108 

 108 

 125 

 143 

 153 

 154 

 KiO 

 161 

 175 

 177 

 191 

 20« 

 212 

 217 

 219 

 230 

 233 

 283 

 287 

 304 

 305 

 306 

 308 

 314 

 315 

 319 



Intkoduction. 



The present article includes the results of a study of a vast 

 amount of material which has been placed in my liands from a 

 number of dift'ei'ent sources. It is, howevei-, based })rimarily upon 

 the collections contained in the Museum of Coiniiarative Zoology, 

 Harvard College. Through the generosity of Mr. Alexander 



