PLATE XXIII. 



Figs. 1-4. Thysanoessa macrura, G. 0. Sars. 

 Fig. 1. Female, from left side ; magnified about ten times. 

 Fig. 2. Anterior part of body, from above. 

 Fig. 3. Extremity of tail, with caudal fan, from above. 

 Fig. 4. Preaual spine. 



Figs. 5-10. Nematoscelis megalops, G. 0. Sars. 



Fig. 5. Adult female, from right side ; magnified about six times. 

 Fig. 6. Same, from above. 

 Fig. 7. Preanal spine. 



Fig. 8. Anterior part of carapace, with the narrow rostral projection, froni left side. 

 Fig. 9. Same, from above. 



Fig. 10. Right side of trunk, with gills in their natural position. 



