PLATE T. 



Serolls cornuta. 



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Fie. 1- -Jale, natural size. 



Fig. 2. Female, uatural size. 



Fig. 3. Immature male, natural size. 



Fig. 4. Terminal joints of one of the anterior antenna3 to show the sensory hairs (6). 



Fig. 5. Terminal joints of one of the posterior antennoe. 



Fig. 6. Isolated joint towards the middle of the flagellum of posterior antenna. 



Fig. 7. Distal half of left mandible, upper surface. 



Fig. 8. Distal half of right mandiljle, upper surface. 



Fig. 9. Maxilla of second pair of appendages. 



Fig. 10. Same appendage of opposite side to show the occasional asymmetr}' of the 

 maxilljB. 



Fig. 11. Maxillipede. 



Fig. 12. First abdominal a].)pendage of right side. 



Fig. 13. Second abdominal appendage of right side. 



Fig. 14. Third abdominal appendage of right side. 



Fig. 15. Several of the hairs fringing the endopodite and exopodite of abdominal 

 appendages. 



Fig. IG. A jiortion of one of the same ; more highly magnified. 



