330 BULLETIN OF THE MUSEUM OF COMPARATIVE ZOOLOGY. 



Fig. 18. The same ; right mandible. 



Fig. 19. The same ; molar crown of mandible. 



Fig. 20. The same ; end of incisor branch of left mandible. 



Fig. 21. The same ; first maxilla, a, inner lobe, b, outer lobe, ri, palpus. 



ep, epignath. 

 Fig. 22. The same ; second maxilla, a, b, lobes of protognath. ri, ramus in- 



ternus. r e, ramus externus, or scaphognathite. 

 Fig. 23. The same ; first maxilliped. Letters as before. 

 Fig. 24. The same ; second maxilliped. b r, gill. 

 Fig. 25. The same ; first abdominal appendage. 

 Fig. 26. The same ; fourth abdominal appendage, s, appendage on inner 



side of the internal branch. 

 Fig. 27. The same ; tip of the styliform appendage (s of the preceding figure) 



of abdominal limbs, highly magnified to show the curled hairs. 

 Fig. 28. The same ; inner branch of second abdominal appendages in the male, 



bearing two slender appendages, s and s'. 

 Fig. 29. The same ; telson and swimmerets. 

 Fig. 30. The same ; carapace. 

 Fig. 31. Rostrum of another adult specimen. 

 Fig. 32. Rostrum of the specimen represented by Fig. 15. 

 Fisj. 33. Rostrum of an individual 9 mm. Ion" 



