TABLE OF CONTENTS. 



Page. 



Preface VII 



Table of contents XIII 



List of illustrations XXV 



Order I. Tanaioidea or Chelifera 3 



Family I. Tanaidse 4 



Genus 1. Pancolus 5 



Pancolus californiensis 5 



Genus 2. Tanais 7 



Tanais loricatus 7 



cavolinii = 8 



alascensis 10 



robustus 11 



normani 14 



Genus 3. Cryptocope 16 



Cryptocope arctica 16 



Genus 4. Leptognathia 17 



Leptognathia caeca 18 



longiremis 19 



Genus 5. Heterotanais 21 



Heterotanais limicola 21 



Genus 6. Leptochelia 22 



Leptochelia f orresti 23 



savignyi 26 



dubia 28 



rapax 30 



filum 31 



Genus 7. Neotanais 32 



Neotanais americanus 32 



hastiger 35 



Family II. Apseudidae. . . 37 



Genus 8. Apseudes 37 



Apseudes espinosus 38 



gracilis 40 



triangulatus 43 



propinquus 45 



Genus 9. Parapseudes 47 



Parapseudes goodei 47 



Genus 10. Typhlapseudes '. 49 



Typhlapseudes nereus 49 



Genus 11. Sphyrapus 51 



Sphyrapus malleolus 52 



