PLATE 275. 



Fig. 2. 



Kg. 7. 



Fig. 3. 



Fig. 6. 



Fig. 5. 



Fig. 1. The Common Shrimp, Crangon vulgaris, Fabr. ; male, natural size. 



Fig. 2. The Common Prawn, Paltemonetes vulgaris, Stimpson ; male, enlarged one and one-half diameters. 

 Fig. 3. The Deep- water Prawn, Pandalus Montagui, Leach ; slightly smaller than natural size. 

 Fig. 4. The Beach-Flea, Orchestia agilis, Smith ; male, enlarged five diameters. 

 Fig. 5. The Scud, Gammarus loeusta, Gould; male, enlarged two diameters. 

 Fig. 6. The Boring Amphipod, Chelura terebrans, Phillipi ; enlarged about fourteen diameters. 

 Fig. 7. The Gribble, iim«orioZi//»M)rMm, White; enlarged ten diameters. 

 Fig. 8. The Salve Bug, ^ga psora, Kroyer; young specimen, enlarged three diameters. 

 Fig. 9. The Horse-shoe Crab, Limulus Polyphemus, Latreille; much smaller than natural size. 

 Drawings by J. H. Emerton, S. I. Smith, and O. Harger. 



