PLATE XVIII. 



Chiridius tenuispinus, G. 0. Sars. 



Fig. 1. Adult female, dorsal view (left anterior antenna not fully drawn). 



2. Same, viewed from right side. 



3. Frontal part of body, lateral view. 



4. Last segment of trunk, exhibiting the spiniform processes of the 



lateral corners, dorsal view. 



5. Posterior antenna. 



6. Mandible with palp. 



7. Maxilla. 



8. Anterior maxilliped. 



9. Posterior maxilliped. 



10. Natatory leg of 1st pair. 

 11. Do. of 2nd pair. 



12. Do. of 4th pair. 



