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BISCAYAN PLANKTON. 



Part V.— THE SCHIZOPODA. 



By E. W. L. Holt and W. M. Tattersall, B.Sc. 



(With Text-figure.) 



With an APPENDIX. 

 By G. Herbert Fowler, B.A., Ph.D., F.L.S., F.Z.S. 



Read 4th ilay, 1905. 



TABLE OF CONTENTS. 



Page 

 Introduction 104 



List of Species. 



Division E U C A III D A, Caiman *. 



Order EUPHAUSIACEA, Boas. 



Family Euphausiidje, Dana. 



Subfamily Euphausis^, H. & T. 



1. Euphausia, Dana 1. Miilleri, Claus 106 



2. Thysanopoda, M.-Ekhc 2. microphthalma ?, G. 0. Sars 106 



3. Meganyctiphanes, H. ^ T. .... 3. norvegica (J/. Sars) 106 



Subfamily NESiATOscELi.viE, II. & T. 



4. Th}-sanoessa, Brandt 4. gregaria, G. 0. Sars 106 



5. Nematosoelis, G. 0. Sars 5. megalops, G. 0. Sars 106 



6. Nematobrachion, Caiman 6. boopis (Caiman) . . 107 



7. Styloeheiron, G, 0. Sars 7. Suhniii, G. 0. Sars 107 



8. abbreviatum, G. 0. Sars 107 



Subfamily BENTHEUPHAnsiN^, H. & T. 



8. Bentbeuphausia, G. 0. Sars .... 9. sp. ? 107 



Division P E R A C A E I D A, Caiman. 



Order MYSIDACEA, Boas. 

 Family EucoPiiDiE, Dana, 



9. Eucopia, Dana 10. unguiculata ( WUl.-SiiJim) 107 



Family Mvsid^, Dana. 



Subfamily Leptomtsinje, Normau. 



10. Euchffitomcra, G. 0. Sars 11. Fowleri, U. ^ T. 104 



Changes in the Vertical Distribution within Twenty-four Hours 108 



Temperature as a Factor in Distribution 110 



(ieueral Table of Distribution 112 



Table of Sizes of Individuals 1 1 4 



Time-Dei)th Tables, showing Captures arranged by Hours and Depths IIS 



Appendix and Summary 122 



* See Caiman, Ann. & Mag. Nat. Hist. ser. 7, vol. siii. Feb. 1904, on " Classification of Malacostraca," where it 

 is proposed to divide the Malacostraca into three divisions ; Eucarhla, I'eracarida, and lloplocarula. 

 SECOND SERIES. — ZOOLOGY, VOL. X. 18 



