MARINE CRUSTACEANS. 459 



EXPLANATION OF PLATE XXIIL 



The telson and 6th abdominal segment of some of the varieties of Gonodaetylug chiragra. 

 Fig. 1. Var. tumidus, type. 1 a. An individual showing traces of the lateral marginal teeth. 

 1 b. Lateral view of the type. 



Fig. 2. Form connecting var. tumidus with var. acutus. 



Fig. 3. Var. acutus. 3 a. Lateral view of the same. 



Fig. 4. Var. smithii a. 4 a. Lateral view of the same. 



Fig. 5. Var. smithii h. 



Fig. 6. Var. segregatus a. 



Fig. 7. Var. segregatus b. 7 a. Lateral view of the same. 



Figs. 8, 9. Var. glabrous. Forms showing connection, or signs of connection, between median and 

 subniedian carinae. 



Fig. 10. Var. incipieus a. 



Fig. 11. Var. incipiens b. 



Fig. 12. Var. segregatus c. 



Fig. 13. Var. = oerstedii'i 



Fig. 14. Var. spinosus. 



Fig. 15. Var. glabrous, term b. 



G. 



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