ON THE ORAL APPENDAGES OF MARINE ISOPODA. 65 



On the Oral Appendages of certain Species of Marine Isopoda. By Walter 



E. Oollinge, D.Sc, F.L.S., Carnegie Fellow, and Research Fellow 



of the University of St. Andrews, the (ratty Marine Laboratory, 



St. Andrews. 



(Plates 7-9.) 



[Read 3rd May, 1917.] 



Contents. 



Page 

 I. Introduction 66 



II. Method of Preparation 67 



III. The Oral Appendages of the Idoteid.i; 68 



IV. Synoptic Table of the Genera dealt with 70 



V. List of Genera and Species examined 73 



Symjiics, Richardson. 



1. Symmius caudatus, Richardson. 



OmniDOTEA, Harger. 



2. Chiridotea c<ecq (Say). 



3. Chiridotea tuftsi (Stimpson). 

 Mesidotea, Richardson. 



4. Mesidotea sabini (Kroyer). 

 Pentidotea, Richardson. 



5. Pentidotea resecata (Stimpson). 



6. Pentidotea wosnesenskii (Brandt). 



7. Pentidotea whitei (Stimpson). 

 Glyptidotea, Stabbing. 



8. Glyptidotea lichtensteini (Krauss). 

 Idotea, Fabricius. 



9. Idotea rectilinea, Lockington. 



10. Idotea phosphorea, Harger. 

 Paridotea, Stebbing. 



11. Paridotea ungulata (Pallas). 

 , var. now atrovirens. 



1 2. Paridotea reticulata, Barnard. 



13. Paridotea rubra, Barnard. 



14. Paridotea fucivola, Barnard. 

 Euidotea, gen. nov. 



15. Euidotea peronii (Milne-Edwards). 

 Erichsonella, Benedict. 



16. Erichsonella attenuata (Harger). 

 Synidotea, Harger. 



17. Synidotea hirtipes, Milne-Edwards. 



18. Synidotea pallida, Benedict. 



19. Synidotea nebulosa, Benedict, 



20. Synidotea anyulata, Benedict. 



21. Synidotea marmorata (Packard). 



22. Synidotea bicuspida (Owen). 



23. Synidotea nodulosa (Kroyer). 



24. Synidotea Itsvis, Benedict. 



VI. Bibliography y () 



Explanation of Plates 9[ 



LINN. JOTJRN. ZOOLOGY, VOL. XXXIV. (J 



